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 O is dominant?Why or why not?
Answers
A man is having blood group A. Hence, he must be having genotype IAIA or IAIO. He will produce two types of gametes IA and IO. A woman is having blood group O. Hence, she is having genotype IOIO. She will produce one type of gamete IO. Their daughter will get IOallele from mother and IO allele from father. Hence, she is having blood group O.
Thus, the given information is enough to tell that blood group A is dominant over blood group O as two alleles of IO are required to have blood group O and only one allele of IAis enough to have blood group A.
Answer:
according to me the blood group O is dominant as Thier son was of blood group O too
as we see that blood A was not inherit on the daughter thus the law of dominance says dominant one should be O