In F2 progeny you get 1:1 ratio represents two phenotypes, what will be the genotype of the parent?(a) Both parent heterozygous(b) Cross between homozygous dominant and recessive(c) Cross between homozygous recessive and heterozygous(d) Both parent homozygous recessiveThe question was asked in class test.My enquiry is from Numerical Problems in portion Mendelian Genetics of Cytogenetics

In F2 progeny you get 1:1 ratio represents two phenotypes, what will b

1.	In F2 progeny you get 1:1 ratio represents two phenotypes, what will be the genotype of the parent?(a) Both parent heterozygous(b) Cross between homozygous dominant and recessive(c) Cross between homozygous recessive and heterozygous(d) Both parent homozygous recessiveThe question was asked in class test.My enquiry is from Numerical Problems in portion Mendelian Genetics of Cytogenetics
Answer» The CORRECT choice is (c) Cross between homozygous recessive and heterozygous Explanation: Considering the two phenotypes having genotype Hh and hh (H being DOMINANT), the f1 must have PHENOTYPE Hh and hh, and so will the parent ALSO have a phenotype HN and hh. This is like a repeated test cross.

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