Question

A child has blood group O. If the father has blood group A and mother has blood group B, what would be the possible genotypes of other offspring? [2]

Answer 1

Blood group

1. If the child has blood group O that means the child has received i allele from one parent and i allele from another parent.
2. If the father has blood group A, that means his genotype is IAi . If the mother has blood group B, that means her genotype is IBi.
3. After performing cross between IAi and IBi we get

	IA	i
IB	IAIB	IBi
i	IAi	ii

Therefore, the possible genotypes of other offspring are : IAIB IBi and IAi