A Group O mother and a Group AB father have what probability of producing offspring that are Group A?

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Multiple Choice

A Group O mother and a Group AB father have what probability of producing offspring that are Group A?

Explanation:
In ABO genetics, a parent with Group O has genotype OO, and a parent with Group AB has genotype IAIB. Each child inherits one allele from each parent. The mother can only pass O, while the father can pass IA or IB with equal chance. So the possible offspring genotypes are IAO (Group A) or IBO (Group B) in a 1:1 ratio. Therefore, half of the offspring will be Group A. There’s no route to Group AB or Group O from this cross, since the father cannot pass an O allele and the mother cannot pass IA or IB.

In ABO genetics, a parent with Group O has genotype OO, and a parent with Group AB has genotype IAIB. Each child inherits one allele from each parent. The mother can only pass O, while the father can pass IA or IB with equal chance. So the possible offspring genotypes are IAO (Group A) or IBO (Group B) in a 1:1 ratio. Therefore, half of the offspring will be Group A. There’s no route to Group AB or Group O from this cross, since the father cannot pass an O allele and the mother cannot pass IA or IB.

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