First slide

Inheritance of One Gene

Question

The genotypes of husband and wife are ‘ii’ and I^AI^B. How many different types of genotypes and phenotypes are possible in the blood group types of the offspring?

Easy

A

3 genotype; 2 phenotypes.
B

2 genotypes; 2 phenotypes
C

3 genotypes, 3 phenotypes.
D

4 genotypes, 3 phenotypes.

Solution

The genotype of husband is ii.
The genotype of wife is I^AI^B.
Therefore, the offspring can have genotype I^Ai and I^Bi. Hence, the phenotypes of the offspring will be A and B blood groups.

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