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The genotypes of a husband and wife are IAIB and IAi respectively. How many different genotypes and phenotypes are possible among the blood types of their children? -

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Question

The genotypes of a husband and wife are IAIB and IAi respectively. How many different genotypes and phenotypes are possible among the blood types of their children?

Options

  • 3 genotypes; 3 phenotypes

  • 4 genotypes; 4 phenotypes

  • 4 genotypes; 3 phenotypes

  • 3 genotypes; 4 phenotypes

MCQ

Solution

4 genotypes; 3 phenotypes

Explanation:

Gametes: Husband Wife
IAIB   × IAi

Offsprings-

  IA i
IA IA IA
'A' blood group		 IA i
'A' blood group
IB IA IB
'AB' blood group		 IB i
'B' blood group

Thus, number of genotypes : 4

number of phenotypes : 3

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