In an example of recessive epistasis the product H substance

In an example of recessive epistasis the product H substance is needed to express the blood antigen. A mating of IA I B Hh X I A I O Hh should produce what ratio of blood types?

1/4 AB, 3/16 A, 3/16 B, 3/8 O

1/4 AB, 1/8 A, 1/8 B, 1/2 O

3/16 AB, 3/8 A, 3/16 B, 1/4 O

3/8 AB, 3/16 A, 3/16 B, 1/4 O

Solution

Answer:

therefore the probablility of

A = 6/16 = 3/8

B= 3/16

AB = 3/16

O = 4/16 = 1/4

Because hh phenotype is recessive and will not be able to produce A or B antigen

as H protein is a precursor to H antigen.

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Therefore correct answer is option (C)