A woman with blood group ‘A’ marries a man with blood group ‘O’

cbse
principleinheritance

#1

A woman with blood group ‘A’ marries a man with blood group ‘O’. Discuss the possibilities of the inheritance of the blood group in the following starting with ‘Yes’ or ‘No’ for each.
(a) They produce children with blood group ‘A’ only.
(b) They produce children some with ‘O’ blood group and some with ‘A’ blood group.


#2

(ii) (a) No, it is not necessary as mother could have a genotype ${{I}^{A}}$${{I}^{A}}$ or ${{I}^{A}}$i. If the genotype is ${{I}^{A}}$, all the offsprings would have A blood group, but in the second case offsprings can have either ‘A’ or O blood group as their father has O blood group.
(b) Yes, if the mother is A (genotype ${{I}^{A}}$ i) and father has O (genotype ii) blood group, then the blood group of some children can be ‘O’ and some can be with blood group ‘A’.