CLASS SET – WRITE ON THE BACK OF YOUR NOTES
Patterns of Heredity Worksheet
Type
Description
Example
Incomplete Dominance
Codominace
Multiple Alleles
Polygenic Traits
1. Complete the following punnett square for a cross between a homozygous red flowered snapdragon
(RR) and a homozygous white snapdragon (WW). Answer the questions that follow:
a.
RR- red
b. What phenotype will be seen?
RW- pink
c. What is this heredity called?
WW- white
2. A cross was made between a Black chicken and a White rooster. All of the chicks produced expressed a
checkered pattern of black and white. In what type of inheritance do both alleles contribute to the
phenotype?
3. T/F (if F change phrase make true)
Traits controlled by more than two genes are said have multiple alleles.
4. Blood groups are classic examples of ________________________ inheritance in humans.
5. Coat color in rabbits is determined by a single gene that has four different alleles. Different
combinations result in four colors of fur. Use the key given to determine all the allele combinations for
Full color, Chinchilla, Himalayan, and Albino fur.
Key
C = full color; dominant
to all others
cch = chinchilla;
dominant to ch and c
alleles
a. Full Color ( 4 possibilities): _______________________________
b. Chinchilla (3 possibilities): _______________________________
c. Himalayan ( 2 possibilities): ______________________________
d. Albino( 1 possibility): __________________________________
h
c = Himalayan;
dominant to c allele
c = Albino; recessive to
all