 HAPPY WEDNESDAY 
Bellwork:
1. Have out your Notecard Sticker Sheet. Lay out your
notecards (definition side up) on your desk 5x4, “Sex-Linked
Traits” needs to be top left card.
2. Write “Complete Q#2 on Page 84.” in your bellwork page
Crossing a black cat with a tan cat produces a tabby cat
(combination of black and tan). This is an example of
incomplete dominance.
a.
b.
Cross a tan cat with a tabby cat, what are the
phenotypes of the offspring?
If you wanted all tabby cats, what color cats would you
want to breed?
Small Group
CHAMPS
G2
Computer
T
T
B
BT
BT
T
TT
TT
50 % Tan Cats
50% Tabby Cats
0% Black Cats
Shoulder Partner
3. Predict the phenotypic ratios of offspring when a
homozygous white cow is crossed with a roan bull.
R
W
W
RW WW
W
RW WW
Phenotypic Ratio = 0 Red: 2
Roan: 2 White
Non-Mendelian Genetics Practice Problems
1. Completed Yesterday
2. Today’s Bellwork
3. Do Question #3 now
Incomplete Dominance/Codominance
1.
2.
3.
Blood Typing Problems
1.
2.
Sex-Linked Problems
3.
4.
PG 84
HW: Incomplete Practice
PG 85
Let’s
Grade
Collect Today
Page 70 – Notecard ALL PARTS
Most Missed MAKE-UP Quiz
Page 85 – Incomplete Practice
Assigned
Genetics MAKE-UP Quiz (Monday)
Page 77 – Family Tree Project Part 2 (Monday)
Genetics Exam (Monday)
Genetics Vocabulary MAKEUP Quiz (WEDNESDAY)
Late
Page 82 – Bikini Bottom Genetics (-30%)
Direct
Instruction
CHAMPS
Essential Question
PG 83
How are multiple
alleles inherited?
Standard
B6F - Predict possible outcomes of genetic combinations such as
Non-Mendelian Genetics.
The situation in which
both alleles contribute
to the phenotype is
called codominance.
In this case, the
heterozygous
phenotype looks like
an equal expression of
both homozygous
phenotypes.
Many genes have more
than two alleles and are
therefore said to have
multiple alleles.
This does not mean that
an individual can have
more than two alleles.
It only means that more
than two possible alleles
exist in a population.
Traits controlled by
two or more genes are
said to be polygenic
traits.
Polygenic means
“having many genes”.
The characteristics of organisms are not only
determined by the genes it inherits.
Characteristics are determined by interactions
between genes and the environment.
Practice
Problems
Table Group
1. If a man with blood type AB marries a woman heterozygous for type A, what is the
probability that their child will be type B.
A
B
A
AA
AB
O
AO BO
25 % chance of Type B
Shoulder Partner
2. A mother has type A blood and a father has type B blood. If their baby has type O
blood, what is the genotype of the parents?
B
O
?
A
AB
A-
O?
B-
OO
Dad = BO
Mom = AO
Independent
3. Use a Punnett square to show the possible genotypes and phenotypes for blood
type of the offspring of two parents, one with blood type O and one with blood type
AB.
O
O
A
AO AO
B
BO BO
Genotypes - 50% AO: 50% BO
Phenotypes - 50% Type A: 50% Type B
Whole Class
4. Two women gave birth to girls in the same hospital at the same time. The nurses think they may have
accidentally switched the babies’ name tags and given the babies to the wrong parents. One baby, Jane, is type O.
The other baby, Mary, is blood type A. The father in one set of parents, the Reds, is blood type A, and the
mother is type B. The father in the other set of parents, the Greens, is blood type AB, and the mother is type
O. Figure out which baby belongs to which parents. Show your work and reasoning.
Reds
B
A
-
B AB
B-
A
O AO
AO
- A-
-OO
O AO
AO BO
Jane – Type O
Greens
BO
Mary – Type A