Cross between homozygous black rough (BBRR) guinea pig and homozygous white smooth guinea pig (bbrr) produced black and rough animals in F1 generation. Presuming the genes to be present on different chromosomes, the percentage of F2 individuals which are heterozygous for both the gene pairs would be
Cross between homozygous black rough (BBRR) guinea pig and homozygous white smooth guinea pig (bbrr) produced black and rough animals in F1 generation. Presuming the genes to be present on different chromosomes, the percentage of F2 individuals which are heterozygous for both the gene pairs would be
The correct option is A 25%
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%’.
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%’.
