Question

deduce and write what will be the probable phenotype for a guineapig bearing genotype Bbrr​

Answer 1

Answer:

A cross between homozygous black rough guinea pigs(BBRR) homozygous white smooth guinea pigs(bbrr) produced black rough guinea pigs(BbRr) in the F1 generation. When the genes for black, white, rough and smooth traits are present on the same chromosomes, in the F2 generation, 6.25% are homozygous black rough(BBRR), homozygous white, smooth(bbrr), homozygous black and white(BBrr), homozygous white, roungh(bbRR), 12.5% are homozygous black heterozygous rough(BBRr), heterozygous black, homozygous rough(BbRR), heterozygous black homozygous white(Bbrr), homozygous white, heterozygous rough(bbRr), 25% are heterozygous Black and rough are formed.

A cross between homozygous black rough guinea pigs(BBRR) homozygous white smooth guinea pigs(bbrr) produced black rough guinea pigs(BbRr) in the F1 generation. When the genes for black, white, rough and smooth traits are present on the same chromosomes, in the F2 generation, 6.25% are homozygous black rough(BBRR), homozygous white, smooth(bbrr), homozygous black and white(BBrr), homozygous white, roungh(bbRR), 12.5% are homozygous black heterozygous rough(BBRr), heterozygous black, homozygous rough(BbRR), heterozygous black homozygous white(Bbrr), homozygous white, heterozygous rough(bbRr), 25% are heterozygous Black and rough are formed.So, the correct option is ‘25%’.