Perform a test cross on the following blood types and answer the questions that follow.
1. a homozygous blood type A male and a blood type AB female
2. a heterozygous blood type B male and a blood type O female
3. a homozygous blood type A male and a heterozygous blood type A female
Questions: How many of their offspring will be:
a. blood type A
b. blood type B
c. blood type AB
d. blood type O
Answer (1)
Homozygous A (IAIA) male × AB (IAIB) femalePossible offspring: IAIA, IAIBBlood types: A (50%), AB (50%), B (0%), O (0%)Heterozygous B (IBi) male × O (ii) femalePossible offspring: IBi, iiBlood types: B (50%), O (50%), A (0%), AB (0%)Homozygous A (IAIA) male × Heterozygous A (IAi) femalePossible offspring: IAIA, IAiBlood types: A (100%), AB (0%), B (0%), O (0%)
