Blood Type Problems Worksheet With Answer Key (Page 2 of 2) in pdf

Blood Type Problems Worksheet With Answer Key Page 2

7. A person with type A blood (unknown genotype) marries a person with type O blood. What blood

types are possible among their children. (Show 2 crosses)

Child can be type A or type O blood.

8. Two people, both with AB blood have four children. What blood types should the children be?

Children will be 1/4 type A, 1/2 type AB, or 1/4 type B.

9. A person with type B blood (genotype BO) has children with a type AB person. What blood types

are possible among their children?

Possible Blood Types: A, AB, B

10. A person with type O blood is married to a person with type A blood (unknown genotype). They

have 6 children, 3 of them have type A blood, three of them have type O blood. What is the genotype

of the two parents?

The type A person myst be heteroyzous to have children who are both A and O. Parents are OO x AO

11. A person has type B blood. What are ALL the possible blood types of his parents. Show the

crosses to prove your answer.

A x B ; A x AB;

B x AB; AB x AB,

B x O, B x B

12. A man of unknown genotype has type B blood, his wife has type A blood (also unknown

genotype). List ALL the blood types possible for their children. (you may need to do multiple crosses

to consider the different possible genotypes of the parents)

A, AB, B (everything but O is possible)

13. Two people with type O blood have three children. How many of those three children also have

type O blood?

All will be O

14. Why is a person with type O blood called a "universal donor"? Type O blood can donate to any

blood type

15. Why is a person with type AB blood called a "universal acceptor"? Type AB blood can receive

transfusions from any blood type.

Blood Type Problems Worksheet With Answer Key Page 2