Warm Up
Put bug lab on desk to be collected – turn in
drawing and chart
Write down and answer the following question in
your notebook.
1. T = tall
t = short
A. What are the 2 possible genotypes of a tall
person?
B. What is the phenotype of a person with a tt
genotype?
1. T = tall
t = short
A. What are the 2 possible genotypes of a tall
person? >
TT or Tt
B. What is the phenotype of a person with a tt
genotype?
Short
Notebook
Table of Contents
March 11
Punnett Squares 7.L.2.2
Notes
March 11
Punnett Squares
How does a Punnett Square help determine
patterns of heredity?
Vocab Review
Dominant Allele - represented using a capital letter.
Recessive Allele – represented using a lowercase
letter
Genotype – combinations of letters
Phenotype – physical characteristics you can see
Vocab Review
Heterozygous – genotype with one capital and
one lowercase letter
Homozygous – genotype with 2 capitals or 2
lowercase letters
7.L.2.2 Vocabulary
Punnett Square > A diagram that shows how
parent’s alleles might combine in offspring
- Used to determine the potential genotypes
and phenotypes of offspring
- Each box = 25% or 1/4
Ratio – two numbers that show the relationship
between two amounts
* Written as number : number 5:4
Percentage – a ratio that compares a number to 100.
ex – 50: 100 = 50%
Probability – percentage/chance that something will
happen.
The probability of having an offspring with brown hair
is 75% or there is a 75% chance
Steps to making a Punnett Square
How to complete a Punnett Square
Step 1 – draw the 4
square
Step 2 – put parent allele’s
on the outside of
Punnett square.
dad – top
mom – left side
Male / Father alleles
B
Female /
Mom
Alleles
b
b
b
Step 3. Distribute parent
alleles
- Bring dad alleles down
- Bring mom alleles across
Step 4. Determine ratio and
probability/percentage
- Look at genotypes inside
Bb = 2
bb = 2
Ratio = 2:2
50% chance of brown eyes
50% chance of blue eyes
Male / Father alleles
B
Female /
Mom
Alleles
b
b
Bb
Bb
b
bb
bb
http://www.youtube.com/watch?gl=US&hl=en&
client=mvgoogle&feature=fvwrel&v=prkHKjfUmMs&rl=y
es&nomobile=1
B
b
B BB
Bb
b Bb
bb
A homozygous dominant red rose crosses with a homozygous recessive
pink rose. What are the possible offspring genotype and phenotypes?
1. Homozygous Dominant Red = RR
Homozygous Recessive Pink = rr
Genotypes:
4 will be Rr
R
r
Rr
r
Rr
R
Rr
Phenotypes
100% of offspring be red
Rr
Two heterozygous black cats (white
cats are recessive) are crossed.
1. Heterozygous black = Bb
B
Genotypes
25% = BB
50% = Bb
25% = bb
Phenotypes
75% = black
25% = white
B
BB
b
Bb
b
Bb
bb
Let’s Practice
1. Punnett Square Worksheet
2. Punnett Practice #1
• Complete worksheets on your own
• When finished with 1 (both sides) check
answers at solution station – do not bring
pens or pencils!!
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
A
C
B
A
B
C
C
B
D
C
A
C
C
Test Corrections
14 – 21
- If marked wrong or ½,
use notes to find correct
answer. Write on
separate sheet and turn
in with test/
- Due Wednesday
Extra Credit
1. Metaphase
2. Prophase
3. Telophase / Cytokinesis
4. Interphase
Warm Up
Put HW on desk (Punnett Square Worksheet)
WRITE ALL PARTS OF QUESTION
A homozygous dominant white dog
crosses with a heterozygous
white dog.
A. What are the possible genotypes?
B. What are the offspring phenotypes?
A homozygous dominant white dog crosses with a
heterozygous white dog.
Homozygous Dominant = HH
Heterozygous = Hh
H
H
h
A. Genotypes = 2 HH, 2 Hh
B. Phenotypes = 100% white
HH
Hh
H
HH
Hh
Exit Ticket Review
A heterozygous male is crossed with a homozygous recessive female
(use the letter t)
Heterozygous = Tt
Homozygous recessive = tt
A.
Genotypes = 2 Tt, 2 tt
t
T
t
Tt
tt
Tt
tt
B. Phenotypes =
50% tall, 50% short
t
HW Review
Homozygous Dominant = 2 capital
Heterozygous = 1 capital , 1 lowercase
Heterozygous = 1 capital, 1 lower case
Heterozygous = 1 capital, 1 lower case
Homozygous tall = 2 capitals
Heterozygous = 1 capital, 1 lowercase
Heterozygous white = 1 capital, 1 lower case
Homozygous black = 2 lowercase
Today’s Agenda
1. Monster Punnett Squares
2. Bikini Bottom Genetics
3. Punnett Square Practice
Heterozygous = different
•
Dominant = Capital
•
Complete front and back
of each sheet
Raise hand for answer
sheet when finished
Homozygous = same
Recessive = Lowercase
Pure = homozygous
Hybrid = Heterozygous
Invent-An-Alien!
Possible Phenotypes:
S/s: Square head (S) or Round (s)
E/e: Three eyes (E) or Five eyes (e)
H/h: Horns (H) or No horns (h)
G/g: Circle nose (G) or Triangle nose (g)
A/a: Two antennae (A) or Three antennae (a)
Y/y: Two eyebrows (Y) or Four eyebrows (y)
T/t: Sharp teeth (T) or Flat teeth (t)
1. Use these seven characteristics to invent and draw your alien.
2. Trade aliens with a partner.
3. On the back of your partner’s paper, draw two chromosomes, each
with seven alleles. Label each chromosome with the alien’s alleles!
Warm Up
Put homework packet on desk
Complete Punnett Square Practice Handout
(both sides) – no talking
Yesterday’s Behavior
Test = 2 people got above a 70, no one got an A
or B
Your behavior hurts your overall grade
No more warnings – automatic consequences
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
A
C
B
A
B
C
C
B
D
C
A
C
C
Green Grade = test grade
Blue = Class Grade
Extra Credit
Test Corrections
Metaphase
14 – 21
Prophase
Telophase / Cytokinesis
Interphase
- If marked wrong or ½,
use notes to find correct
answer. Write on
separate sheet and turn
in with test/
- Due Thursday
Warm Up
Put HW packet on desk
Write & Answer following question in your
notebook
A homozygous recessive frog with spots is
crossed with a heterozygous female with no
spots. What is the probability of their
offspring having spots? Create a Punnett
square to solve
A homozygous recessive frog with spots is crossed with
a heterozygous female with no spots. What is the
probability of their offspring having spots?
Male = ff
Female = Ff
Spots = F
There is a 50% chance
Of their offspring having
spots
f
f
F
Ff
Ff
f
ff
ff
Yesterday’s Exit
A heterozygous purple monster
crosses with a homozygous
recessive blue monster
What are the two parent
genotypes?
Pp
pp
B. What are the possible offspring
genotypes?
2 Pp
2pp
C. What are the possible offspring
phenotypes?
50% purple, 50% blue
P
p
A.
p
Pp
pp
Pp
pp
P
6.
7.
8.
2. True
3. False
4. C. Genotypes
1. E
2. I
3. H
4. J
5. C
6. D
7. B
8. F
9. G
10. A
Warm Up
1. Take out all Leveled Curriculum work from
yesterday
2. Begin silently working
Leveled Curriculum
Due – End of class Today
Level C – Complete 2 with
* and 1 of choice (3)
Level B - Complete 2 with
* and 1 of choice (3)
Level A – Complete the 1
assignment
Directions
• Test Grade
• Work independently
• Copying = 0 for both
people
• When you finish a level
raise your hand to get
signature
Alien Genetics
1.
Select ONE male and
ONE female alien from
front page, circle them
2. Determine parent
genotypes for each trait
(write under directions)
Skin Color - Eye Color
- Height Superpower
Arms
Recessive = 2 lower case
Dominant = you choose 2
capital or heterozygous
3. Complete Punnett Squares
4. Under Punnett Square
write possible offspring
phenotypes
5. Draw baby on back using
traits from Punnett Squares
6. Explain the traits of your
baby for EACH of the traits
you made in the Punnett
Squares
Warm Up
Put packet from Friday on your desk
Write down the words below and an example of each
into your notebook (use the letter t)
1.
2.
3.
4.
5.
6.
7.
8.
Homozygous Dominant
Homozygous Recessive
Heterozygous
Phenotype
Genotype
Inherited Trait
Acquired Trait
Allele
1.
2.
3.
4.
5.
Homozygous Dominant > TT
Homozygous Recessive > tt
Heterozygous > Tt
Phenotype > characteristic – hair color
Genotype > combinations of alleles/letters in our
genes – tt
6. Inherited Trait > something passed down ,eye color
7. Acquired Trait > something you change or learn,
attitude
8. Allele > combinations of the same trait or gene
represented by a letter T
1. height, hair texture, freckles
2. T, H, t, h
3. Combinations of alleles
4. Physical characteristics you can see
5. Tt, Hh, Ff
6. A capital letter
7. A lowercase letter
8. tt, hh, ff
9. ff
10. Tt
11. rr
12. Short
13. BB, Bb, bb
14. HH = Right hand Hh= right hand hh = left
15. Step 1 – Red: R White: r
Step 2 – RR
Rr
rr
RR = Red
Rr = red
rr = white
16. Smooth: H
Fluffy: h
Step 2. HH
Hh
hh
Step 3. HH = Smooth
Hh = Smooth
hh = fluffy
Leprechaun Genetics
1. Luke = RR
Lola = Rr
R
R
R
RR
RR
r
Rr
Rr
100%
Luke = Gg
Lola = Gg
Green Eyes = 75%
G
g
G
Gg
Gg
g
Gg
gg
Luke: Ll
Lola : ll
L
l
l
Ll
ll
l
Ll
ll
50%
Luke’s Dad – FF
Luke’s Mom – FF
F
F
F
FF
F
FF
f
Lola’s Dad - ff
Lola’ Mom - ff
f
ff
f
ff
FF
FF
f
ff
ff
Luke - FF
Lola – ff
F
F
f
Ff
Ff
f
Ff
Ff
Freckles = 100%
Luke = Ww
Lola = Ww
W
W
50% Ww
25% ww
25% WW
w
w
WW
Ww
Ww
ww
Hair – Red hair
Eyes – green eyes
Skin Color- light skin
Freckles - freckles
Widows Peak –has widows peak
1A. Parent 1 – WW
W
W
w
Parent 2 – Ww
W
WW
Ww
WW
Ww
short whiskers = 0%
1B
W
Short = 0%
W
w
Ww
w
Ww
Ww
Ww
PDF
Part A
1. Dominant = capital Letter
2. Recessive = lower case
3. Punnett Square = Diagram used to determine
possible offspring genotypes and phenotypes
Skill Challenge
1. Heterozygous
2. TT
3. tt
4. Tt
5. ¼
b. ¼
c. 2/4 or ½
Quiz
Eyes on your own paper
No talking – stay in seat – raise your hand if you need
something
*when finished, raise hand
• Work on something silently (read)
#4 – Hairy ears : recessive
Women = heterozygous