Question

A girl has the blood group A. What is true of the inheritance of this blood group in her case?

विकल्प

• Her mother should be homozygous O

• Her both parents should be with O group blood

• Her father could be heterozygous A

• Both her parents could be heterozygous A

Answer 1

Her father could be heterozygous A

Explanation:

Blood group A can be due to genotype IAIA (homozygous) or IAi (heterozygous). If a girl has blood group A, her father could be heterozygous A (IAi), carrying one A allele and one O allele. The mother could have either A or O alleles contributing to the child's blood group. The mother's blood group cannot be homozygous O if the child is A, and both parents cannot have blood type O. Both parents can be heterozygous A, but that is not the only possibility. Therefore, the most accurate statement is that her father could be heterozygous A.