Review guide for Punnett squares, pedigrees, and blood typing

1. Alien information

Trait Dominant phenotype recessive phenotype

Body color Y = yellow y= orange

Number of A= 2 a=1 2

Antenna

Eye color P= purple p= white

Eyesight G= glasses needed g= glasses not worn

Number of body rings R= 3 r= 5

Directions: Using this information regarding our aliens, answer the following questions1-7: Be sure to give me genotypes and phenotypes even if it is not asked of you. Then answer you question separately . YOU MUST SHOW ALL WORK on a separate sheet of paper.

1.  A heterozygous male mates with a pure yellow female. What is the chance this couple will produce an orange baby?

2.  Two purple-eyed aliens mate. Both aliens are hybrid for eye color trait. What is the chance that this couple will produce a baby with a homozygous recessive genotype?

3.  A heterozygous female with 3 body rings mats with a 5-ringed male. What is the chance that this couple will have a baby that looks like its mother?

4.  A 3-ringed female mates with a homozygous male. The female has been genetically tested and is carrying both the dominant and recessive allele for the trait. The male displays the recessive phenotype. What is the chance that this couple will have genetically pure baby?

5.  Two 3-ringed, yellow bodied aliens mate. What is the chance their child will be 5-ringed and orange. Both individuals are shown to be heterozygous.

6.  A male who is white eyed and does not wear glasses marries a alien that is white eyed but does wear glasses. She was tested and here genotype is homozygous dominant. What is the chance their child will wear glasses?

7.  A male who is recessive for body rings but heterozygous for number of antenna mates with a female who is homozygous for body rings and recessive for number of antenna. What are the possible genotypes and phenotypes of their offspring.

8. A bison herd has started to show a genetic defect. Some of the males have a

condition known as “rabbit hock” in which the knee of the back leg is slightly

malformed. This is shown to be sex-linked. Suppose a normal male bull mates with

a female cow that is normal but has shown to be a carrier. What is the chances of

producing a normal son? What percent of the females will be carriers?

9. A woman with red-green color-blindness has a mother with normal vision. Knowing that color-blindness is a sex-linked recessive gene, can you determine what her father’s genotype is? If so what is it?

a. This woman marries a man with normal vision, what is the probability they will

have sons who are red-green color blind? What is the probability they will have

daughters that are red-green color blind?

10. A boy, whose parents and grandparents had normal vision, is colorblind. What are the genotypes for his mother and father and his maternal grandparents? Normal is dominant to the recessive colorblind trait.

Blood typing

11. Mr. Hartzel: O Mr. Simon AB Mr. Peach: O

Mrs Hartzel: A Mrs. Simon AB Mrs. Peach:O

Baby Jenn: O

Rebecca: A

Holly: B

Using the information above, tell me which couple had which baby. Be sure to show all possible punnett squares to support your answer.

** These questions do not use the info above.

12. A child has blood type A. What are all possible blood types of its parents? Show all

punnett squares for support.

13. Can two parents that are Type O- have a child that is type A+? Show work

14. Is it possible for a mom who is type A with a Genotype of AA and dad who is type B

with a genotype of BB to have a child that is type B? Why or why not?

15. A major accident has occurred on the freeway and 2 patients are in dire need of blood

transfusions. The first patient is type AB- and the second type is B+. There is no O+

or O- blood available. What are the remaining compatible blood types that can be

given to each of these accident victims?

Pedigrees:

16. Albinism is a disease that causes people to lack pigmentation. Kelly and Mike are normal for pigmentation and have two children Jake and Jane, both are normal. Jane marries John who is normal. John’s two sisters are also normal and their parents are normal. Jane and John have three children Jessica who is normal, Jackie who is albino, and a son Jonah, who is albino.

a. Draw the pedigree

b. Is the trait sex-linked? Explain your answer

c. Is it a dominant or recessive trait? Explain your answer

d. Label the genotypes.

For the next two pedigrees do the following,

a.  Label the genotypes

b.  Is it a sex-linked trait? Explain

c.  Is it a dominant trait? Explain