NEET BIOLOGY

Detailed explanation-1: -The cross would produce offspring with three possible types of genotypes; BB, Bb, and bb in the ratio 1:2:1. The phenotype ratio would be 3(black): 1 (brown). Thus, the probability of a homozygous dominant (BB) would be 1 out of 4.

Detailed explanation-2: -A rabbit that is heterozygous Bb will be black. Why? Because the B allele is dominant over the recessive b allele, so a rabbit with genotype Bb will have the same coat color phenotype as a rabbit with the dominant homozygous genotype BB.

Detailed explanation-3: -In rabbit, black skin (B) is dominant over brown skin (b), and short hair (S) is dominant over long hair (s). All F1 offsprings are heterozygous black-short haired.

Detailed explanation-4: -In rabbits, black skin (B) is dominant over brown skin (b) and short hair (S) is dominant over long hair (s). If a homozygous black skin, short-haired male is crossed with a homozygous brown skin, long-haired female, all F1 offspring are heterozygous black and short-haired.

Detailed explanation-5: -In a population of rabbits, black is the dominant color and white is the recessive. In rabbits, fur color follows a pattern of co-dominance. The heterozygous genotype produces black and white spotted rabbits.