Question

The genotypes of a Husband and Wife are IAIB and IAi.
Among the blood types of their children, how many different genotypes and phenotypes are possible?

Answer 1

There are 4 genotypes possible I^AI^A, I^Ai, I^AI^B, I^Bi. And four phenotypes i.e. blood group A,B,AB.

Answer 2

Answer:

4 genotypes and 3 phenotypes

Explanation:

Genotype of husband = IAIB (Given)

Genotype of wife =  IAi (Given)

Thus, according to the law of independent assortment -

The gametes have gene R and r, and they have also alleles Y and y.

The segregation of 50% of R and 50% of r is always independent from segregation of 50% Y and 50% of y  

- wherein  the combination will be -

Thus, there are four genotypes of gametes, RY, Ry , rY and ry each with frequency of 25% of the total gametes hence produced.

Therefore, 4 genotypes and 3 phenotypes are possible.