Assuming that in sheep, the allele for black coat colour is dominant over that for brown coat colour. What percentage of the F generation will have black co...

Assuming that in sheep, the allele for black coat colour is dominant over that for brown coat colour. What percentage of the F generation will have black colour when two heterozygotes are crossed?

Answer Details

In this scenario, we are crossing two heterozygotes (Bb x Bb) where B represents the dominant allele for black coat color and b represents the recessive allele for brown coat color. Each parent has one dominant allele and one recessive allele. When we cross these two heterozygotes, their offspring will inherit one allele from each parent. The possible combinations are BB, Bb, Bb, and bb. BB represents homozygous dominant, which means the offspring will have black coat color. Bb represents heterozygous, which means the offspring will also have black coat color because the dominant allele masks the recessive allele. bb represents homozygous recessive, which means the offspring will have brown coat color. Therefore, out of the four possible combinations, 3 have at least one dominant allele, which will produce black coat color. So, the percentage of the F1 generation that will have black color is 75% (3 out of 4 possible combinations). Hence, the answer is 75%.