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The typing of human blood is determined by three alleles: A, B, and O. Alleles A and B are codominant to one another and O is recessive to both alleles, A and B.

AA/ AO – type A blood, AB – type AB blood, BB/ BO – type B blood, OO – type O blood.

A woman who is homozygous for type B blood marries a man who is heterozygous for type A.

What is the genotype ratio of their offspring?
What is the phenotype ratio of their offspring?

Sagot :

Genotype 1 : 1

Phenotype Blood group AB : B
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