Black hair in rabbits is determined by a dominant allele, B, and white hair by homozygosity for a recessive allele, b. Two heterozygous rabbits mate and produce a litter of seven offspring. With what frequency would we expect to find:

a) four white and three black offsping
b) one white and six black offspring

Option-B

Explanation:

In the given question,

1. Dominant trait - black, dominant genotype will be- BB or Bb

2. Recessive trait- white, recessive genotype will be- bb

When the cross is performed between the two heterozygous that is between Bb x Bb as follows

                     B        b

            B     BB     Bb

             b       Bb     bb

Since this shows that the dominant allele is expressed by the 3 out of 4 progenies and the recessive allele is expressed by 1 out of 4 progenies. This shows that there is a higher number of rabbits with Black fur than white fur.

Thus from the given question, Option B can be justified with only one white and six black but Option A cannot be justified with three black and fur white.

Thus, Option-B is the correct answer.

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).