a rough black guinea pig bred with a rough, white one yielded the following offs

Question

a rough black guinea pig bred with a rough, white one yielded the following offspring: 28 rough black 31 rough white 11 smooth black and 9 smooth white. what are the genotypes of the parents a rough black guinea pig bred with a rough, white one yielded the following offspring: 28 rough black 31 rough white 11 smooth black and 9 smooth white. what are the genotypes of the parents a rough black guinea pig bred with a rough, white one yielded the following offspring: 28 rough black 31 rough white 11 smooth black and 9 smooth white. what are the genotypes of the parents

Explanation / Answer

Total number of rough progeny = 28+31 = 59.

Total number of smooth progey = 11+9 = 20.

Then, the ratio of rough and smooth progeny = 59/20 = 3:1( 3 rough and 1 smooth)

The genotype for this ratio = Rr and Rr.

Total number of black progeny = 28+11 = 39.

Total number of white progeny = 31+9 = 40.

Then, the ratio = 1:1(1 black and 1 white).

The genotypes for this ratio = Bb and bb.

Then the genotypes of the parents - RrBb and Rrbb.

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