Download Punnett Squares Practice Quiz

Name __________________
Punnett Squares Quiz
For questions 1-4, use the following scenario.
In a certain species of rabbits the heterozygous condition produces a grey eyed rabbit. The homozygous
phenotypes are black and white.
1. This type of inheritance is called:
a) incomplete dominance
b) codominance
c) polygenic
2. Give examples of the genotypes for the 3 different eye colors
_________________
________________
d) multiple allele
________________
3. If a black eyed rabbit and white eyed rabbit were crossed
a) all of their offspring would be black eyed
b) all of their offspring would be grey eyed
c) their offspring would be 25% white, 50% grey, and 25% black
d) could not have offspring since both are female.
e) all of their offspring would have type “AB” blood
4. Hemophilia is a disease characterized by the inability of a person’s blood to clot normally. It is caused
by a recessive allele linked to the “X” chromosome. Jerome is a hemophiliac. His wife, Tanisha, is a
carrier for hemophilia. Show the possibilities for the offspring for Jerome and Tanisha. Include the cross,
Punnett square, phenotypic ratio, genotypic ratio, and the number of carriers.
5. Jill has type A blood. Her son Elijah has type O blood. Jack, some deadbeat Jill knew in college, says
that he is the father of Elijah. Jill swears that he is not the father and is having a restraining order issued
against Jack to keep him away. If Jack has blood type AB, could he be the father of Elijah? Show your
work!
6. In turkeys, a dominant gene R produces the familiar bronze color; its recessive allele r results in red.
Another dominant gene H results in normal feathers; its recessive allele h produces feathers without
webbing, so that they resemble tufts of hair. If the parents are a red turkey that has feathers without
webbing and hybrid bronze, hybrid normal feathered turkey, show the following:
a. the parent cross (e.g. what are the parents’ genotypes?
____________ x ______________
b. cross the parents using a Punnett Square
c. What is the genotypic ratio of the offspring?
d. What is the phenotypic ratio of the offspring?