INHERITANCE UNIT
DOOR
Period 1
FRONT TABLE
Javier
PROJECTOR
Tyler
Anna
Zachary
Robert
Cheye
nne
Arnoldo
Nathanael
Deshawn
Lucas
Justin
Jessica P.
Dennis
Katherine Kambria
Brent
Marie
Miles
LAB TABLE
LAB TABLE
Blake
Markel
Corie
LAB TABLE
Jessica H.
Christian
LAB TABLE
Period 2
FRONT TABLE
PROJECTOR
Havanaa
DOOR
Hasret
Heather
Chelsea
Adrianne
Steven
Michael
Jesus
Cheyenne Deja
Breonna
Austin
Tyler
Rosario
Charles
Gabriel
Daymontria
Shakira
Natalie
LAB TABLE
Vishawn
Kenny
LAB TABLE
LAB TABLE
LAB TABLE
Clara
DOOR
Period 4
FRONT TABLE
PROJECTOR
Christian
Jonathan
Destiny
Ariadne
Jacob
Herschel
Donovan
John
Dejon
Brevin
Kaylie
Devin
Rameshion Alejandro
Terresia Kaylah
Crescencia
Elizabeth
LAB TABLE
LAB TABLE
Celestial
LAB TABLE
LAB TABLE
DOOR
FRONT TABLE
Period 5
PROJECTOR
Jonathan
John
Phillip
Nick
David
Garrison
Trenten
Amber
Malyk
Matthew
Detarius
Austin
Dalton
Sheyan
ne
Le
Rehema
LAB TABLE
Andrew
LAB TABLE
LAB TABLE
LAB TABLE
Ezra
Joenika
Bell Ringer – 02/24

What are three things that I should know about
you? (Sports? Music? Clubs/activities?)
Learning Target: We will understand the classroom rules
and procedures.
Closure task: I can explain the procedure for entering the
classroom.
Agenda




Syllabus & Procedures
Intro to New Unit
Baby mice handout
Begin “Gifts from your parents”
+
A little bit about me!
A little bit about me!
A little bit about me!
I went to a college called Middlebury College
A little bit about me!
A little bit about me!
+
Classroom Procedures
Talking in class and electronics
Talking and speaking in class will happen
during specific times determined by our
activity. I will direct you of the appropriate
talking level.
 Electronic devices will only be used when
directed by Mr. Lambert. If I see it, I will take
it.

+
Classroom Rules
What do I have to do to be successful?
1.
2.
3.
4.
5.
Keep all hands, feet, legs and objects to yourself.
Follow directions the first time they are given.
Stay in your assigned area unless given permission to
move.
Use appropriate and positive language.
Stay on task & keep your head up!
+
My Classroom Expectations
What do these look like?
1.
2.
3.
4.
5.
Treat all people with RESPECT.
Do not talk while I am talking or while a
classmate is talking
Actively participate and ask questions.
Follow all procedures.
Give your best effort.
+
Consequences
What happens when I do not meet expectations?
Warning
2. Private Warning
3. Private Conference
4. Parent Contact
5. Referral
*The order of consequences may be changed based
upon the severity of the behavior. This is up to the
discretion of the teacher.*
1.
When I need your attention
I will say “I need your attention please”
2. You should stop talking, turn around, and
face me.
1.
+
Classroom Procedures
Entering the classroom
1.
2.
3.
4.
5.
Say hello to me! Give me a handshake/fist-bump/hifive. Enter quietly.
Pick up your notebook and folder from the appropriate
basket.
Pick up your Bell Ringer & any handouts on the back
table.
Find your assigned seat and complete the bell-ringer
activity.
Eyes on me when you are finished.
+
Classroom Procedures
Exiting the classroom
1.
2.
3.
4.
5.
At 5 minutes to the end of class, you will stop your
activities and work on the Exit Slip.
When you are finished with your Exit Slip put your
notebook & folder back in the crate (or your book
bag).
Place your Bell Ringer sheet in the turn in tray.
While at your desk, clean up your area and pack up
your materials. Pick up any garbage on the floor.
Remain in your seat and wait quietly for dismissal by
me, not the bell.
+
Tour of classroom

Look around the classroom and find the
following items:
 Pencil
 DO
Sharpener
NOT sharpen pencils while I am talking
 Hand-in
tray
 Graded work tray
 Make-up work folders
+
Bathroom Passes

No students will be allowed to use the restroom
unless it is an EMERGENCY
+
What is inheritance??

Big Ideas we will cover in this new unit:
 What
is it that is being passed on?
 How is it that we look like people in our
families?
 How is it that we look different than our
siblings?
Baby Mice Handout

Read the intro and choose a friend to agree with.

Explain WHY you agree with them
Similarities….Differences

Think about your family. Do you look like your
parents/siblings?
 How
is it that we look like people in our
families?
 How is it that we look different than our
siblings?

http://www.bbc.com/future/story/20130712-geneticportraits-of-families
Begin “Gifts from Your Parents”

Page 418-419
Exit Slip

Answer these questions:
1.
2.
3.
4.
What is the procedure for entering the classroom?
What do you need to pick up?
What is it that is being passed on?
How is it that we look like people in our families?
How is it that we look different than our siblings?
How did you do? Rate yourself!
I can understand the classroom rules and procedures.
I can explain the procedure for entering the classroom.
GIFTS FROM YOUR
PARENTS. PEDIGREES
Bell Ringer – 02/25
What is an acquired trait?
 What is an inherited trait?

Learning Target: We will define and give an example of
a carrier.
Closure task: I will complete the pedigree practice
Agenda



Finish reading “ Gifts from your parents”
Videos about the family
Analysis questions
From the reading

What is a carrier? Why did the czarina believe that
she was responsible for her son’s disease?
Russian Royal Family


http://www.youtube.com/watch?v=2cjcD8KvXFE&lis
t=PL6A6DAC2E41D8C1B0
http://www.youtube.com/watch?v=MZ4bQUUtt8Y
&list=PL6A6DAC2E41D8C1B0
What is a pedigree?
• A tool to track how
traits are inherited in
a family
Pedigrees





A pedigree is a diagram of family relationships that uses
symbols to represent people and lines to represent genetic
relationships. These diagrams make it easier to visualize
relationships within families, particularly large extended
families. Pedigrees are often used to determine the mode of
inheritance (dominant, recessive, etc.) of genetic diseases
Males = squares
Females = circles
Colored in = affected
Half colored in = Carrier – they carry the gene but do not
have the disease
Interpreting Pedigrees








How many males are there?
How many females are there?
How many marriages are
there?
How many children did each
couple have?
How many generations are
present?
How many individuals are
affected with the disease?
How many are carriers of the
disease?
Who is more likely to have
the disease?
Interpreting Pedigrees








How many males are there?
How many females are there?
How many marriages are
there?
How many children did each
couple have?
How many generations are
present?
How many individuals are
affected with the disease?
How many are carriers of the
disease?
Who is more likely to have
the disease?
What do you notice about…


Who is affected by hemophilia in the pedigree?
Who is a carrier for the disorder?
Analysis Questions pg 418


Answer the questions in your notebooks
Question 2C:
 Inherited
trait - You get this from your parents!
 Acquired trait - You get this during your life!
Pedigree Worksheet

Fill out the worksheet individually
Pedigree Worksheet
When finished, pass your groups
papers to the group next to you.
 Take a classmate’s worksheet and
write your name on the bottom
right corner.
 Grade your classmate’s paper

Game of Chance




Pg 420
Answer question 1 independently
Share your answer with your partner
Be prepared to share with the class
Step 2A

Make a prediction of how many
heads & tails you will get
Create a Data Table for Step 2
Total Heads
Total Tails
Answer questions



Pg 420-421
Question 2C – role of chance
Questions 3, 4, & 5
Back to the big question!

How is it that we look different
than our siblings?
Analysis question (pg. 422)
Answer analysis question #1
with a partner

Exit Slip

Draw a pedigree of your family,
starting with your grandparents.
Label with the names of your family
members.
How did you do? Rate yourself!
I can define and give an example of a carrier..
I can complete the pedigree practice.
GAME OF CHANCE
Bell Ringer – 02/26

What kind of information can you track with a
pedigree?
Learning Target: We will describe how chance plays a
role in inheritance
Closure task: I can calculate probabilities related to
inheritance
Game of Chance




Pg 420
Answer question 1 independently
Share your answer with your partner
Be prepared to share with the class
Step 2A

Make a prediction of how many
heads & tails you will get
Create a Data Table for Step 2
Total Heads
Total Tails
Rabbit mating
Trial
# of offspring
Males
Females
% males
Vs. % female
1
10
6
4
60%/40%
2
10
4
6
40%/60%
3
10
7
3
70%/30%
Trial
# of offspring
Males
Females
% males
Vs. % female
1
600
279
321
46.5%/53.5%
2
600
296
304
49.3%/50.7%
3
600
316
284
52.6%/47.3%
Discussion



Is there a benefit to a larger sample size?
Are the results generally closer to 50% in smaller or
larger sample sizes?
When does chance have a bigger effect on the
outcome? Smaller or larger sample size?
Blue People of Kentucky
Back to the big question!

How is it that we look different
than our siblings?
Analysis question (pg. 422)
Answer analysis question #1
with a partner

What is a gene?

Please complete the before watching side of the
anticipation guide.
What is a gene?

http://www.youtube.com/watch?v=5MQdXjRPHmQ

Fill out anticipation guide after watching section
Patterns of Inheritance

Read pg 427 and observe the pictures – what is the
difference between pictures a and b?
Inheritance of One Trait pg 428




Complete Processes and Procedures 1-6
Homozygous: If the beans are the same color
Heterozygous: If the beans are two different colors
The beans represent genetic information
Trial #
1
2
3
4
Bean #1 Color
Bean #2 Color
Homozygous
or
heterozygous?
Straight or
floppy ears

Record the trait
(straight/floppy
ears) of your
bean
combinations
• Which bean
color is more
influential??
• Why?
Which trait is dominant?
 Which trait is recessive?

Each bean represents genetic
information from your parents.
This information is represented
with letters:
• S = dominant trait (straight
ears)
• s = recessive trait (floppy
ears)
Quick write : Question 7a

Did one bean color (which corresponds to one piece
of inherited genetic information) have a greater
influence in determining the ear trait than the other
bean color?
Exit Slip


If a family has 4 sons, what is the chance that their
next child will be a daughter?
What is the difference between a dominant trait
and a recessive trait?
How did you do? Rate yourself!
I can describe how chance plays a role in inheritance
I can calculate probabilities of inheritance.
PATTERNS OF INHERITANCE
PART A
Bell Ringer – 2/27


If a family has 4 daughters, what is the chance that
their next child will be a daughter?
What does the information in genes code for?
Learning Target: We will describe how traits are inherited.
Closure task: I can complete my personal glossary.
Agenda




Review patterns of inheritance activity part A
Phenotype/genotype essay
Personal Glossary
Part B patterns of inheritance
Inheritance of One Trait pg 428




Complete Processes and Procedures 1-6
Homozygous: If the beans are the same color
Heterozygous: If the beans are two different colors
The beans represent genetic information
Trial #
1
2
3
4
Bean #1 Color
Bean #2 Color
Homozygous
or
heterozygous?
Straight or
floppy ears

Record the trait
(straight/floppy
ears) of your
bean
combinations
• Which trait is
more influential??
• Why?
Which trait is dominant?
 Which trait is recessive?

Each bean represents genetic
information from your parents.
This information is represented
with letters:
• S = dominant trait (straight
ears)
• s = recessive trait (floppy
ears)
Quick write : Question 7a

Did one bean color (which corresponds to one piece
of inherited genetic information) have a greater
influence in determining the ear trait than the other
bean color?
Personal Glossary

Complete your personal glossary as you do your
reading!
Phenotype and Genotype


Page 492
Complete the reading close reading style
 Scan
for important words, highlight, make notes in
margins
 Write a one sentence summary of each paragraph!
 Read through once
 As you read fill out the personal glossary
Phenotype and Genotype Discussion


Other than genetics, what affects phenotype? How?
How is genetic information stored? How is this stored
information organized in the cells?

What role do alleles play in sexual reproduction?

Explain a simple inheritance pattern.
Concept Map using the essay
Phenotype & Genotype



Fill in the concept map using the information from
the essay independently.
When cued, work with a partner to fill in blanks
As a class discuss.
Exit Slip

What is the difference between a phenotype and
genotype?
How did you do? Rate yourself!
I can describe how traits are inherited.
I can complete my personal glossary.
Bellringer





If you have a heterozygous pair, what is the
probability you will give the white bean?
What is the probability you will give the brown
bean?
Standard topic: Inheritance
Learning Target: #3,11, 15
Closing Task: I will complete a concept map using
vocab terms
PATTERNS OF INHERITANCE
PART B
Bell Ringer – 03/02

Define genotype and phenotype and explain how
they are related.
Learning Target: We will define genotype, phenotype,
allele, and independent assortment
Closure task: I can complete a genetics vocab card sort.
Phenotype and Genotype Discussion


Other than genetics, what affects phenotype? How?
How is genetic information stored? How is this stored
information organized in the cells?

What role do alleles play in sexual reproduction?

Explain a simple inheritance pattern.
Phenotype vs Genotype


Phenotype – observable traits
Genotype – genetic makeup of a cell
Analogies:
• Blueprint  Building
• Recipe  Cake
Chromosomes

Chromosome – DNA that has been tightly coiled
Alleles

Allele – alternative forms of the same gene
Principle of Dominance
Principle of Independent Assortment



States that genes sort independent of one another.
For example: Floppy eared white rabbit mated with
a straight eared brown rabbit can have a
floppy eared brown baby rabbit
Concept Map using the essay
Phenotype & Genotype



Fill in the concept map using the information from
the essay independently.
When cued, work with a partner to fill in blanks
As a class discuss.
Vocab Card Sort



Review terms
Game!
We will split you into groups. The idea is to match
the definition to the term. When you think you have
it check it against your personal glossary.
Part B – Inheritance of two traits.





Pg. 429 - Read the intro
Examine the tables in the need to know box.
These are the results of a cross that follows two
traits (ear type and gender).
Answer question 4 a and b in your notebooks
Class discussion
Top 8 Strategies for the ACT Science Test




Read through the instructions carefully, to orient
yourself
Don't worry about details on your initial readthrough
Always refer to the passage and the question-stem
before selecting an answer
In order to read most graphs and tables, you have
to do four things: determine what's being
represented, determine what the axes represent,
take note of units of measurement, and look for
trends in the data
Top 8 Strategies for the ACT Science Test




When reading data, you should be on the lookout for the
three characteristic patterns or trends: extremes (maximums
and minimums), critical points (or points of change), and
direct or inverse variation (or proportionality)
If time is a problem, focus on the questions that require
analyzing data from just a single table or graph
Don't waste time trying to figure out which scientist is "right."
Just worry about understanding their different viewpoints
Don't panic if you don't understand both scientists' positions.
Many questions will hinge on just one of the arguments.
Test Layout




The Science Reasoning Test has seven science
passages:
3 Data Representation passages
3 Research Summaries passages
1 Conflicting Viewpoints passage
KAPLAN Video –
Conflicting Viewpoints

1.
2.
http://www.kaptest.com/College/ACT/About-theACT/act-science-test.html
Identify what’s being studied.
Figure out the opinions.

3.

Determine what is different about each point of view.
Circle any relevant data.
https://www.youtube.com/watch?v=E5ZuY1yB3XY
Practice questions

http://www.actstudent.org/sampletest/science/sci_
01.html
Data representation questions

https://www.youtube.com/watch?v=EiUK_JewKPM
Here’s a summary of the process for
answering questions:




Read the question and, if necessary, restate it in
your own words so you understand what it is asking.
Refer back to the passage.
Formulate an answer in your own words, without
looking at the answer choices.
Match your answer to the choices provided.
Exit Slip
What is an allele?
 How does the principle of independent
assortment leads to genetic variation?

How did you do? Rate yourself!
We will define genotype, phenotype, allele, and
independent assortment.
Closure task: I can complete a genetics vocab card sort.
ACT DAY!
Bell Ringer – 03/03


If two dogs are bred, one has spots and blue eyes
and the other is solid brown and has brown eyes, is it
possible to get a puppy with spots and brown eyes?
Why or why not?
What is the name of the principle that addresses this?
Learning Target: We will demonstrate how genes are
inherited independently.
Closure task: I can complete the Genetics with a smile
worksheet.
Agenda



Genetics with a smile
TED Talk
Brain Games/NOVA
“Genetics with a Smile” handout

Read the directions carefully.
TED Talk

http://www.ted.com/talks/jack_horner_building_a_
dinosaur_from_a_chicken

NOVA “Cracking your genetic code”
 http://www.amazon.com/gp/product/B007RKRE14/re
f=dv_dp_ep6

Brain Games – Addiction
 https://www.youtube.com/watch?v=QAnN8r8CpJk
Exit Slip

How does the “Genetics with a Smile” activity
demonstrate independent assortment?
How did you do? Rate yourself!
We will demonstrate how genes are inherited
independently.
I can complete the Genetics with a smile worksheet.
GENETICS PRACTICE & CASE
OF TWO GENETIC DISORDERS
Bell Ringer – 03/09






Predict the phenotype for these genotypes:
Straight hair (S) is dominant to curly hair (s).
What is the phenotype?
SS=__________________
Ss=___________________
ss=___________________
Learning Target: We will identify the mode of inheritance
of common genetic disorders.
Closure task: I can identify how Huntington's disease &
cystic fibrosis are inherited
Agenda


Genetics practice WS
Case of two genetic disorders
Genetics practice worksheet


Work on this individually for 10 minutes
Then compare your answers to your neighbor
Case of two genetic disorders pg 496



Huntington’s disease
Cystic Fibrosis details
You will be working in
details
What are the
pairs to do this activity.
What kind of
symptoms?
disorder
is
it?
One of you will read the
What kind of
Recessive
or
info on Huntington’s
disorder is it?
dominant?
disease and the other will
Who gets it?
Is it recessive or
read the info on Cystic
Is there a treatment?
dominant?
fibrosis. Take notes on the
Shared characteristics
disorders and then share
with your partner.
Copy this note taking sheet Fill this part in after you have taken
into your notebooks.
notes and shared
Analysis questions pg 430 #1-4

Complete these questions with your partner
Video!

Eye Color
 https://www.youtube.com/watch?v=kaWoN4PmkZw
Review key terms card sort



Same card sort as last time!
This time we will time it.
First team done gets bonus points!
Exit Slip


Which disease (Huntington's disease or cystic
fibrosis) are you more likely to inherit?
Why?
How did you do? Rate yourself!
I can identify the mode of inheritance of common genetic
disorders.
I can identify how Huntington's disease & cystic fibrosis are
inherited
QUIZ & BEGIN MEIOSIS
Bell Ringer – 03/10
For each phenotype, give the genotypes that are possible for
Patrick.
A tall head (T) is dominant to short (t).
Tall = _______________ Short = _______________
Pink body color (P) is dominant to yellow (p).
Pink body = ________Yellow body = ________
Learning Target: We will review key terms for the quiz.
Closure task: I can complete the inheritance quiz.
Agenda




My Parents Wrecked My Favorite Gene
Review vocab words
Concept Map on personal glossary
Quiz
My parents wrecked my favorite gene
Phenotype vs Genotype


Phenotype – observable traits
Genotype – genetic makeup of a cell
Analogies:
• Blueprint  Building
• Recipe  Cake
Chromosomes

Chromosome – DNA that has been tightly coiled
Alleles

Allele – alternative forms of the same gene
Principle of Dominance
Principle of Independent Assortment



States that genes sort independent of one another.
For example: Floppy eared white rabbit mated with
a straight eared brown rabbit can have a
floppy eared brown baby rabbit
Principle of independent assortment
Review key terms card sort



Same card sort as last time!
This time we will time it.
First team done gets bonus points!
Concept Map



Fill in the concept map using the information from
the essay independently.
When cued, work with a partner to fill in blanks
As a class discuss.
Video
Can you genetically enhance yourself?
 https://www.youtube.com/watch?v=N-48RVaqZck
Quiz time!
Exit Slip


How well did you understand the material from this
unit?
What is one concept that you still do not
understand?
How did you do? Rate yourself!
I can review key terms for the quiz.
I can complete the inheritance quiz.
MEIOSIS
Bell Ringer – 3/11
Do all of the cells in our bodies have the same
number of chromosomes?
Learning Target: We will explain the advantages of
sexual reproduction through meiosis
Closure task: I can draw the stages of meiosis.
Agenda



Why do sexual reproduction?
Intro to Meiosis
Draw the steps of meiosis
Big picture questions


What is the benefit of sexual reproduction?
Why not just duplicate ourselves?
Asexual reproduction

Single-celled eukaryotes
 yeast
(fungi)
 Protists
 Paramecium
 Amoeba

Simple multicellular
eukaryotes
 Hydra
budding
budding
What are the
disadvantages of
asexual reproduction?
What are the
advantages?
https://www.youtube.com/
watch?v=hXaswpUjK-M
Turn and Talk
What are the disadvantages of asexual
reproduction?
 What are the advantages of sexual
reproduction?

Discussion

What is sexual reproduction?
Sexual reproduction creates variability
Sexual reproduction allows us to maintain both genetic
similarity & differences.
Jonas
Brothers
Baldwin brothers
Martin & Charlie Sheen, Emilio Estevez
Variation from random fertilization

Sperm + Egg = ?
 any
2 parents will produce a zygote with over 70
trillion (223 x 223) possible diploid combinations
Variation!
Black & White twins
 https://www.youtube.com/watch?v=8bB9PPjp04o
 https://www.youtube.com/watch?v=vsEBYjaAnF0
Turn and Talk

What contributes to the fact that we look different
than our siblings?
How about the rest of us?

What if a complex multicellular organism
(like us) wants to reproduce?
 joining
of egg + sperm
What if we did, then….
46
egg
+
46
92
sperm
zygote
Doesn’t work!
Putting it all together…
meiosis  fertilization  mitosis + development
gametes
46
23
meiosis
23
egg
23
46
23
zygote
fertilization
sperm
46
46 46
46 46 46
4646 46
mitosis
development
Homologous chromosomes

Paired chromosomes
 both chromosomes of a pair carry “matching” genes
 control
same inherited characters
 homologous = same information
diploid
2n
2n = 4
single stranded
homologous
chromosomes
double stranded
homologous chromosomes
Sister chromatids: DRAW
Human female karyotype
46 chromosomes
23 pairs
Human male karyotype
46 chromosomes
23 pairs
How do we make sperm & eggs?

Must reduce 46 (diploid) chromosomes  23 (haploid)

must reduce the number of chromosomes by half
23
46
meiosis
46
zygote
23
egg
46
23
23
sperm
gametes
fertilization

Which type of cells does Meiosis occur in?

The Reproductive System: Produces, stores, nourishes,
and releases sex cells.
Copyright © 2010 Ryan P. Murphy

Sperm: Male sex cell (gamete)

Egg (Ovum): Female sex cell.

Fertilization: The joining of the egg and the sperm.
 The
sperm and egg contain genetic information that will
allow this one cell to multiply into trillions.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces gametes
(reproductive cells).
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy

Meiosis: Cell division that produces reproductive
cells.
Copyright © 2010 Ryan P. Murphy
Exit Slip


What is the primary advantage of sexual
reproduction?
Draw and label homologous chromosomes & sister
chromatids.
How did you do? Rate yourself!
We will explain the advantages of sexual reproduction
through meiosis
I can draw the steps of meiosis.
MEIOSIS STAGES
Bell Ringer – 3/12


What is the primary advantage of sexual
reproduction?
Draw and label homologous chromosomes & sister
chromatids.
Learning Target: We will describe each stage of meiosis.
Closure Task: I can draw the steps of meiosis.
Agenda


Fertilization video
Draw steps of meiosis
Video!

Fertilization
 https://www.youtube.com/watch?v=_5OvgQW6FG4
Follow along on pg 500

We will walk through the stages of meiosis and you
will draw along in your notebooks.
Before we begin…
Each chromosome duplicates itself to
form sister chromatids
Prophase 1
Homologous chromosomes pair up
 Crossing over occurs – pieces of
homologous chromosomes switch places

Metaphase 1

Each pair of homologous chromosomes
lines up in the middle of the cell
Anaphase 1

Each pair of homologous chromosomes
are split up and pulled to opposite sides
Telophase 1

Cell splits into two cells
Metaphase 2

Chromosomes (sister chromatids) line
up in the middle
Anaphase 2

Sister chromatids are separated
Telophase 2

Cells divide into two
In summary…
One diploid cell produces four haploid
cells (gametes)
 Meiosis makes sex cells (sperm/eggs)
 Each gamete has a different combination
of genes

Remember this!!!

PMATMAT
Overview of meiosis
I.P.M.A.T.P.M.A.T
2n = 4
interphase 1
prophase 1
metaphase 1
anaphase 1
n=2
n=2
prophase 2
telophase 1
metaphase 2
anaphase 2 telophase 2
n=2
Meiosis 1 & 2
Meiosis video

https://www.youtube.com/watch?v=rqPMp0U0HO
A
Exit Slip
During which stage does crossing over
occur?
 If two diploid cells go through meiosis,
how many gametes (haploid cells) would
they produce?

How did you do? Rate yourself!
We will describe each stage of meiosis.
I can draw the steps of meiosis.
MEIOSIS POSTER
Bell Ringer – 3/13

How does meiosis increase the variability of sexual
reproduction? Think Prophase 1…
Meiosis quiz Monday!
Learning Target: We will determine the distribution of
alleles during meiosis.
Closure Task: I can trace a set of alleles through meiosis
Agenda




Meiosis video
Meiosis interactive activities
Meiosis poster – tracking alleles
Meiosis analysis questions
Meiosis videos/activities

Meiosis: Creating sex cells interactive CD
Overview of meiosis
Draw overview of
meiosis on board
Meiosis Poster



Complete individually
Fold legal size paper into eight
Use your checklist to make sure you include
everything you need!
C
c
w W
C = cream eye
c = tan eye
W = white wing
w = spotted wing
Poster analysis – answer in notebook
1.
2.
3.
What is the genotype of each sperm for eye color
and wing color?
What other genotypes are possible?
At what point would you change how you
positioned your chromosomes to obtain the other
possible genotypes?
Principle of segregation

The two alleles for each gene separate during
meiosis
 Gametes
have equal chance of inheriting either allele
(but NOT both)
Exit Slip
What is the main purpose of meiosis?
 If a cell with the genotype BbGg goes
through meiosis, what are the different
possible genotypes of the gametes?

Meiosis quiz Monday!
How did you do? Rate yourself!
We will determine the distribution of alleles during meiosis.
I can trace a set of alleles through meiosis.
Bell Ringer – 3/16
What is the main purpose of meiosis?
 If a cell with the genotype BbGg goes through
meiosis, what are the different possible
genotypes of the gametes?

Meiosis quiz!
ESD today for
phenotype/genotype essay
ESD Wednesday for Meiosis
Learning Target: We will analyze the distribution of alleles
during meiosis.
Closure Task: I can ace the quiz!
Agenda




Finish meiosis poster
Poster analysis questions
Meiosis card sort
Meiosis quiz
Finish Meiosis Poster



Complete individually
Fold legal size paper into eight
Use your checklist to make sure you include
everything you need!
C
c
w W
C = cream eye
c = tan eye
W = white wing
w = spotted wing
Poster analysis – answer in notebook
1.
2.
3.
What is the genotype of each sperm for eye color
and wing color?
What other genotypes are possible?
At what point would you change how you
positioned your chromosomes to obtain the other
possible genotypes?
Law of segregation

The two alleles for each gene separate during
meiosis
 Gametes
have equal chance of inheriting either allele
(but NOT both)
Nondisjunction
• failure of homologous chromosomes or sister
chromatids to separate properly during cell division
The value of sexual reproduction

Sexual reproduction introduces genetic variation

genetic recombination

independent assortment of chromosomes


crossing over


mixing of alleles across homologous chromosomes
random fertilization


random alignment of homologous chromosomes in Metaphase 1
which sperm fertilizes which egg?
Driving evolution

providing variation for natural selection
metaphase1
Double division
of meiosis
DNA replication
Repeat
I can’t
after
hear you!
me!
1st division of
meiosis separates
homologous pairs
2nd division of
meiosis separates
sister chromatids
Meiosis 1
Meiosis 2
Steps of meiosis

Meiosis 1
 prophase
1
 metaphase 1
 anaphase 1
 telophase 1

1st division of
meiosis separates
homologous pairs
(2n  1n)
“reduction division”
Meiosis 2
 metaphase
2
 anaphase 2
 telophase 2
2nd division of meiosis
separates sister
chromatids
(1n  1n)
* just like mitosis *
Meiosis card sort
Exit Slip
What is one thing you fully understand
about meiosis?
 What is one thing that you are still
confused about?

How did you do? Rate yourself!
We will analyze the distribution of alleles during meiosis
I can ace the quiz!
Bell Ringer – 3/16
What is the acronym for remembering the
stages of meiosis?
 What is the difference between Metaphase 1
and Metaphase 2?

Meiosis quiz!
ESD Wednesday for Meiosis
Learning Target: We will describe the process of meiosis.
Closure Task: I can ace the quiz!
Agenda




Meiosis manipulatives
Meiosis final review
Meiosis quiz
Video on Mendel’s pea plants
Meiosis manipulatives

Follow along with me as I demonstrate the stages of
meiosis.
Nondisjunction
• failure of homologous chromosomes or sister
chromatids to separate properly during cell division
Double division
of meiosis
DNA replication
Repeat
I can’t
after
hear you!
me!
1st division of
meiosis separates
homologous pairs
2nd division of
meiosis separates
sister chromatids
Meiosis 1
Meiosis 2
Meiosis 1

2n = 4
single
stranded
1st division of meiosis separates
homologous pairs
prophase 1
2n = 4
double
stranded
metaphase 1
2n = 4
double
stranded
synapsis
tetrad
reduction
telophase 1
IRepeat
can’t
after
hear you!
me!
1n = 2
double
stranded
Meiosis 2

2nd division of meiosis separates sister
chromatids
prophase 2
What does
this division
look like?
1n = 2
single
stranded
1n = 2
double
stranded
metaphase 2
4
telophase 2
1n = 2
double
stranded
Quiz time!
Mendel’s pea plants video






Mendel’s peas part 1
Mendel’s peas part 2
Mendel’s peas part 3
Mendel’s peas part 4
Mendel’s peas part 5
Mendel’s peas part 6
Exit Slip
What is one thing you fully understand
about meiosis?
 What is one thing that you are still
confused about?

How did you do? Rate yourself!
We will describe the process of meiosis
I can ace the quiz!
Exit Slip

What did Mendel contribute to our
knowledge of genetics?
How did you do? Rate yourself!
We will describe the process of meiosis
I can ace the quiz!