Question
If two parents with type A blood have a child, which of the following statements is true about the baby’s blood type?
Answers
Answered by
GPT-4o mini
When both parents have type A blood, they can have different genotypes - they could both be homozygous (AA) or both be heterozygous (AO). Here’s how it breaks down:
1. **If both parents are AA (homozygous)**:
- The only possible genotype for the child is AA (type A blood).
2. **If both parents are AO (heterozygous)**:
- The potential genotypes for the child can be:
- AA (type A blood)
- AO (type A blood)
- AO (type A blood)
- OO (type O blood)
- This means there’s a 75% chance the child will have type A blood (AA or AO) and a 25% chance the child will have type O blood (OO).
3. **If one parent is AA and the other is AO**:
- The potential genotypes for the child can be:
- AA (type A blood)
- AO (type A blood)
- In this case, the child will always have type A blood.
### Conclusion
The true statement about the baby's blood type is that the child can have type A blood or, depending on the specific genotypes of the parents, there is also a possibility of having type O blood.
1. **If both parents are AA (homozygous)**:
- The only possible genotype for the child is AA (type A blood).
2. **If both parents are AO (heterozygous)**:
- The potential genotypes for the child can be:
- AA (type A blood)
- AO (type A blood)
- AO (type A blood)
- OO (type O blood)
- This means there’s a 75% chance the child will have type A blood (AA or AO) and a 25% chance the child will have type O blood (OO).
3. **If one parent is AA and the other is AO**:
- The potential genotypes for the child can be:
- AA (type A blood)
- AO (type A blood)
- In this case, the child will always have type A blood.
### Conclusion
The true statement about the baby's blood type is that the child can have type A blood or, depending on the specific genotypes of the parents, there is also a possibility of having type O blood.