Question

a man with blood group O marries a women with blood group A what is the blood group of their daughter

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Answer 1

Answer:

o...

Because the father has more qualities in the baby

Answer 2

Answer:

The daughter can have blood group B or O similar to the parents.

Explanation:

The Blood grouping system is an example of co-dominance. Blood group O has 'ii'  as the alleles which are both recessive.

B blood group has $I_{B}$  i genotype.

Using this the possible genotypes of the daughter are $I_{B}$  i and ii.

The daughter can have blood group B or O similar to the parents.