First slide

Inheritance of One Gene

Question

Choose the correct statement with respect to Blood groups in man

Easy

A

AB blood group has two genotypes
B

O blood group has only one genotype
C

Individual with A blood group is always homozygous
D

Individual with O blood group is heterozygous

Solution

AB blood group has only one genotype known as $I^{A} I^{B}$ , O blood group has only one genotype. Individuals with A blood group are either homozygous ( $I^{A} I^{A}$ ) or heterozygous ( $I^{A} i$ ) and individual with O blood group is homozygous (ii).

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