Q. If a tri hybrid muta man marries a white woman. what will be the phenotype ratio in the off spring?

Dear student,
The genotype of mulatto male is AaBbCc. Therefore 8 types of gamete will be formed (ABC, ABc, AbC, Abc, aBC, aBc, abC, abc). The genotype of white woman is aabbcc, then the gamete formed will be abc.
  ABC ABc AbC Abc aBC aBc abC abc
abc AaBbCc AaBbcc AabbCc Aabbcc aaBbCc aaBbcc aabbCc aabbcc

Therefore the phenotypic ratio will be 1:3:3:1


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