Question

A man with blood group A marries a woman with blood group O and their daughter has blood group o. Is this information enough to tell you
which of the traits - blood group A or 0 - is dominant? Why or why not?​

Answer 1

Answer:

plz follow me plz

Explanation:

The given information is not enough to determine the traits- blood group A or O is dominant.

In ABO blood grouping blood type A is always dominant whereas, the blood type O is always recessive.

Here the father's blood group is A hence, it can either be homozygous (AA) or heterozygous (AO).

The mother's blood group is O and it is only possible if it is heterozygous (OO).

For the daughter to have blood group O the father must be heterozygous (AO) and mother must be (OO).

Answer 2

This information is not enough to determine the traits, either A or O is dominant. A, B, ABO blood group are generally dominant. If the father's blood group is A, genotypes will be (AA) or (AO). If the mother's blood group is O, genotypes will be (OO) or (AO). Hence, we cannot determine the dominant blood group.