 J: Quiz
 Stamp: None
 CW: Meiosis
Quiz / Notebook Setup
 HW: Notebook Setup & Interactive
Reader Pgs. Due Monday, February 2nd
• Honors: 143-145
• Regular: 109-121
Left Side, pg #
Right Side, pg #
(31) Determining Traits Notes
(32) Simple Genetics Practice Problems
(33) Dihybrid Crosses Notes
(34) Traits and Probability Reinforcement
(35) Beyond Mendel Guided Notes
(36) Incomplete/Co Dominance Examples
(37) X Linked Genes Notes
(38) X Linked Examples
(39) Pedigree Guided Notes
(40) Pedigree Practice
(41) Review Questions
(42) Review Answers
J: How are traits passed from one generation to
the next?
 TI: None
 CW: Gregor Mendel & Trait Notes / Notebook
Setup

• Update your table of contents. Title & number each page
Left Side, pg #
Right Side, pg #
(31) Determining Traits Notes
(32) Simple Genetics Practice
Problems

HW: Reader Pgs. 143-145 Due Monday, 2/2,
Punnett Square wkst #1 DUE F 1/30
Copy Yellow Text into your
notebooks
 Born
in 1852 in Czech Republic
 Spent 14 years working in monastery and
teaching
 Discovered genetics working with peas
in monastery garden
Gregor
Mendel’s experiments with
pea plants laid the foundation for
genetics




Blending Hypothesis
Traits from mother and
traits from father blend
together
These traits cannot be
separated!
Like coffee mixed with
cream



Particulate Hypothesis
Traits from mother and
father are kept separate
from each other
Some traits are hidden
by more powerful traits




Mendel mated true-breeding father (Yellow peas) with
true-breeding mother (Green peas).
True-Breeding: produce offspring identical to
Punett
Square: Used to test
themselves
(parent)
for possible
genecopies of traits they can
Each parent
has two alleles:
give to child
combinations (offspring)
Parents Genes: DNA determines the possible alleles
(traits) a parent can Ygive to the
child Y- allele for yellow pea
Y
P1 Generation
Father 
y
Mother 
y
y- allele for green pea
Yy
Yy
Yellow
Yellow
Yy
Yellow
Yy
Yellow
Father- YY
Mother- yy
 Why
did all the peas come out yellow?
Where did mothers green pea trait go?
• The green pea color (mother’s trait) is recessive to
the yellow pea color (father’s trait) so remains
hidden behind yellow pea color. All peas appear
yellow.
• Dominant trait: visible trait
• Recessive trait: hidden trait
 How do we represent a dominant trait?
• Dominant trait represented with CAPITAL letter
 How do we represent a recessive trait?
• Recessive trait represented with lower case letter
 Homozygous
alleles- Aka: True-breeding
• Homozygous Dominant-YY
• Homozygous Recessive- yy
Cross Heterozygous
pea (Yy)alleles
 Heterozygous
alleles: Yellow
2 different
with a Heterozygous Yellow Pea (Yy)
• Yy
F1 Generation
Y- yellow pea
y- green pea
Phenotype- Physical trait
(yellow peas, green peas)
Genotype- Genes/Alleles
(YY, Yy, yy)
Pod Color: Yellow vs. Green
Pod Shape: Smooth vs. Constricted
Plant Height: Tall vs. Short
Flower Color: Purple vs. White

J: 10 facts on Bozeman Genetics

TI: Punett Square Worksheet #1, Journals Week 19 & 20 (50
pts)

CW: Dihybrid Notes, Traits & Probability Reinforcement,
Punett Square Work Day- Simple Genetics Problems
Worksheet
Left Side, pg #
Right Side, pg #
(31) Determining Traits Notes
(32) Simple Genetics Practice Problems
(33) Dihybrid Crosses Notes
(34) Traits and Probability Reinforcement

HW:
• Reader Pages 143-145 DUE M 2/2
• Simple Genetics Problem Worksheet (check on M 2/2)
• Dihybrid Practice DUE MON 2/2
You are still required to turn in ALL work due today. Please
behave and be respectful!
Mrs. Narubin will be providing you with the information for todays
lecture. You are required to be on your BEST behavior! Any
disturbances or rudeness will result in an immediate referral and
removal from the class.
J:Describe the difference between heterozygous and homozygous.
Give examples of each.
 TI: Reader pages 143-145 & Dihybrid Wkst
 CW: Fill in Beyond Mendel Guided Notes
(Update your Table of Contents, Title & Number each page! Pick up
the two handouts and add them to appropriate page)

Left Side, pg #
Right Side, pg #
(35) Beyond Mendel Guided Notes
(36) Incomplete/Co Dominance Examples

HW: Finish Incomplete/ Codominance practice Questions DUE T
2/3
Co- dominance, Incomplete
dominance and multiple alleles
 In
some cases, an intermediate phenotype
is shown
 Neither allele is dominant
 In snapdragons, flower color can be red,
pink, or white. The heterozygous condition
results in pink flowers (or an intermediate
trait)
 A white snapdragon crossed with a red
snapdragon produces all pink offspring
 Two pinks crossed together
• produce 1/4 white, 2/4 pink, and 1/4 red
 Try
These Crosses in your Notes!
•Sickle cell disease is incompletely dominant in humans. AA x aa = Aa
(sickle cell trait), where some blood cells will have abnormal shapes





Both alleles can be expressed
For example, red cows crossed
with white will generate roan
cows. Roan refers to cows that
have red coats with white
blotches.
This phenotype might seem to
support the blending theory.
(The blending theory predicts
pink F1 progeny.)
The phenotypic outcomes for
cow color and incomplete
dominance in general can be
explained biochemically.
One allele of the gene codes for
an enzyme that functions in the
production of the red color. The
other allele codes for the gene to
make white color. If both alleles
are present, both are expressed,
resulting in a cow that has some
red and some white.
In shorthorn cattle, when a red bull (RR) is crossed with a
white cow (WW), all the offspring are roan—a spotted,
red and white or milky red color.


What offspring are expected from mating a roan bull and a roan
cow?
What phenotypes would you expect from a cross between a red
bull and a white cow?




In humans, there are
four blood types
(phenotypes): A, B, AB,
and O
Blood type is controlled
by three alleles. A, B, O
O is recessive, two O
alleles must be present
for the person to have
type O blood
A and B are co
dominant. If a person
receives an A allele and
a B allele, their blood
type is type AB


Crosses involving
blood type often use
an I to denote the
alleles - see chart.
When doing blood
type crosses, you will
need to know whether
a type A or B person is
heterozygous or
homozygous. Type O's
are automatically OO
and type AB is
automatically AB.
Crosses are
performed the same
as any other.

Blood type determines what
antibodies are located within
the blood.
• Type A =B antibodies.
• If type B blood is put into their
bodies, their immune system
reacts as if it were a foreign
invader, the antibodies clump
the blood - can cause death.


Type AB blood has no
antibodies, any blood can be
donated to them="universal
acceptors"
Type O blood has no surface
markers on it, antibodies in
the blood do not react to type
O blood, ="universal donors"
 J:Complete the cross:
• BB= Black / BW= Black with White Spots / WW = White
• BB x BW
• List the genotypes and phenotypes once done with the
cross.
 TI: none
 CW: Oompa
Loompa Worksheet Practice Day
Left Side, pg #
Right Side, pg #
(35) Beyond Mendel Guided Notes
(36) Incomplete/Co Dominance Examples
 HW: Oompa
Loompa DUE W 2/4
 J: Explain
the difference between co
dominance and incomplete dominance.
Give an example of each
 TI: Oompa
Loompa wkst
 CW: Sex-linked
(37) X Linked Genes Notes
 HW: Sex
Genetics Notes & Practice
(38) X Linked Examples
Linked Wkst DUE Th 2/5
Chromosomal Theory of
Inheritance: simply
states that
chromosomes are
carriers of genetic
information (Walter
Sutton)
Humans have 22 pairs
of autosomes, 1 pair
of sex chromosomes
Fruit flies have 3 pairs
of autosomes, 1 pair
of sex chromosomes
What is the sex
of this person?
Female eggs = XX
Male sperm = XY
Possible offspring are
shown in square:
50% male
50% female
What happens when an allele is
located on the X chromosome?
Males only get ONE !
These are a few
of the known
alleles located on
the X
chromosome
Disorders that are
recessive are
masked in
females by the
other X
chromosome.
Sex Linked Genes
•Genes located on the X chromosome are
inherited with that X.
•When doing crosses you must include the
sex chromosomes in your cross.
•Use superscript letters for the allele.
Example: In fruit flies, eye color is a sex linked
trait. Red is dominant to white.
Females
XRXR
XRXr
XrXr
Males
XR Y
Xr Y
Thomas Morgan
used crosses with
fruit flies. Why do
you think he used
them?
What is an autosome?
Show the cross between a white eyed male and a red
eyed female: XrY x XRXR
Show the cross between a red eyed male and a white
eyed female:
1. Colorblindness
2. Muscular Dystrophy
3. Hemophilia
4. Fragile X Syndrome
Muscular Dystrophy
• characterized by the wasting away of
muscles
• life expectancy: ~20 yrs
• females can be carriers for the disease,
where they pass the disease to their sons
only
Show the cross of a female who is a carrier and a
normal male:
Fragile X Syndrome
• caused by triplet repeats in a gene on the X chromosome
• causes mental retardation
• named because the X chromosome had an odd appearance - the tip of the
chromosome seemed to be attached only by a small thread
• the number of repeats of the gene determines the severity of the disease
• also known as "bleeder's disease", blood does not clot properly
• disease was present in the royal family, starting with Queen Victoria
Show the cross between a female with hemophilia and a normal
man:

J: Complete the sex linked cross:
• B= Not bald / b = bald
• A bald man with a carrier female
• List the genotypes and phenotypes for both sexes.


TI: Sex Linked Wkst
CW: New Seats, Pass back all work, Pedigree Notes And Practice
(39) Pedigree Guided Notes
(40) Pedigree Practice
(41) Review Topic 1 & 2
(42) Review Topic 3&4



HW: Review for Unit 4: Genetics Test T 2/10
*** If you are new to class you will need to have 5 3 prong folders
by next Tues 2/10*** (See me if you have any concerns)
Unit 4 Genetics Folder DUE W 2/11- Make sure all pages are
complete, table of contents updated, pages are titled and
numbered, essential questions are answered, and concept map is
complete





Squares represent males
Circles are used for females
A horizontal line from male to
female represents mates that
have produced offspring
The offspring are listed below
their parents from oldest to
youngest
A fully shaded individual posses
the trait being studied
• If the condition being studied is a
monogenic recessive condition (rr),
then those shaded gray have the
genotype rr
• If the condition being studied is
dominant condition (Rr or RR), then
those that are unshaded have the
genotype rr

A line through a symbol
indicated that the person is
deceased
J: Is this a sex linked trait? What
must the identified mother’s
genotype be?
 TI: none
 CW: Unit
4 Review
 HW: Finish
Review /
Test Monday



J- NONE
TI- none
CW- Science Course Assembly
• Expectations
(39) Pedigree Guided Notes
(40) Pedigree Practice
(41) Review Topic 1 & 2
(42) Review Topic 3&4




HW- Unit 4: Genetics Test T 2/10 (200 pts)
Complete reviews on pgs 39 & 40  DUE T 2/10 (40 pts)
*** If you are new to class you will need to have 5 3 prong
folders by next Tues 2/10*** (See me if you have any concerns)
Unit 4 Genetics Folder DUE W 2/11• Make sure all pages are complete, table of contents updated, pages are
titled and numbered, essential questions are answered, and concept map is
complete



J-What were the two topics covered on the review that you
understood the best? What two topics do you understand the
least?
TI- none
CW- Partner Test Review (14 pts)
Left Side, pg #
Right Side, pg #
(43) Partner Review Questions
(44) Partner Review Answers




HW- Unit 4: Genetics Test T 2/10 (200 pts)
Complete reviews on pgs 39 & 40  DUE T 2/10 (40 pts)
*** If you are new to class you will need to have 5 3 prong folders
by next Tues 2/10*** (See me if you have any concerns)
Unit 4 Genetics Folder DUE W 2/11• Make sure all pages are complete, table of contents updated, pages are titled
and numbered, essential questions are answered, and concept map is
complete
 J- Test reflection. (3 sentence minimum)
• What did you struggle on? What did you do well on?
Any strategies you plan to use next test?
 TI- Checking Review pages 41 & 42
 CW- Unit 4 Genetics Test (200pts)
 HW- Bring in Unit 5 folder
• *** If you are new to class you will need to have 5 3
prong folders by next Tues 2/10*** (See me if you
have any concerns)
• Unit 4 Genetics Folder DUE W 2/11 Make sure all pages are complete, table of contents
updated, pages are titled and numbered, essential
questions are answered, and concept map is complete