Question

Study the following pedigree chart of a family starting with a mother with AB blood group and father with O blood group. Mention the blood and genotype of off spring numbered 1,2and 3.

Answer 1

Offspring 2 will be either A or type O. The offspring of Generation 1 will be having
Cross
$AB\times OO$

Offspring 2-
Cross
$Ao\times oo$

Offspring 3-
Can be either
Cross $Ao\times Ao$

Offspring 1 will be type A or B

Offspring 3 will type A, Type AB, type B or O, depending upto the genotype of its parents.