Question

n rabbits, the allele for spotted coat S is dominant to the allele for solid coat, s. The allele for black coat color B is dominant to the allele for brown coat color, b. All of the progeny produced by mating a solid black rabbit with a spotted brown rabbit were found to be spotted black. The genotype of the progeny is a. SSBB b. SsBb c. SSBb d. SsBB e. ssBb

Answer 1

F1 SsBb

Step-by-step explanation:

In rabbits, the allele for spotted coat S is dominant to the allele for solid coat s. Thus, the spotted coat is inherited in the dominant manner as SS or Ss and the solid coat is inherited in recessive manner as ss.

The allele for black coat color B is dominant to the allele for brown coat color. Thus, the black coat colour is inherited in the dominant manner as BB or Bb and the brown coat colour is inherited in recessive manner as bb.

The cross between a solid black rabbit and a spotted brown rabbit. to produce all spotted black, the genotype of the parent has to be this:

P ssBB x SSbb

sB Sb

F1 SsBb

This cross would produce all spotted black offspring. Any other would produce either one or more brown rabbit among the blacks.