Question
A husband is homozygous for blood type A and his wife is heterozygous for blood type B. What are the possible blood types for their offspring?
Select TWO correct answers.
B
O
ABO
AB
A
Answers
GPT-4o mini
To determine the possible blood types of the offspring from a homozygous blood type A husband and a heterozygous blood type B wife, we need to understand the genotypes involved.
- The husband, being homozygous for blood type A, has the genotype **AA**.
- The wife, being heterozygous for blood type B, has the genotype **BO**.
Now, we can set up a Punnett square to find the possible genotypes of their offspring:
```
B O
__________
A | AB | A |
__________
A | AB | A |
__________
```
From this Punnett square, we can see the possible genotypes for their offspring:
1. **AB** (from A and B)
2. **A** (from A and O)
Now, converting these genotypes to blood types, we find:
- Genotype **AB** gives blood type **AB**.
- Genotype **A** gives blood type **A**.
Therefore, the possible blood types for their offspring are **AB** and **A**.
Thus, the TWO correct answers are:
- **A**
- **AB**
- The husband, being homozygous for blood type A, has the genotype **AA**.
- The wife, being heterozygous for blood type B, has the genotype **BO**.
Now, we can set up a Punnett square to find the possible genotypes of their offspring:
```
B O
__________
A | AB | A |
__________
A | AB | A |
__________
```
From this Punnett square, we can see the possible genotypes for their offspring:
1. **AB** (from A and B)
2. **A** (from A and O)
Now, converting these genotypes to blood types, we find:
- Genotype **AB** gives blood type **AB**.
- Genotype **A** gives blood type **A**.
Therefore, the possible blood types for their offspring are **AB** and **A**.
Thus, the TWO correct answers are:
- **A**
- **AB**