In cats,short hair (L)is dominant to long hair (l); if a short-haired cat of unknown genotype is crossed with a long-haired animal,and they produce one long-haired and one short-haired kittens,this would indicate that
A) the short-haired cat was pure-breeding.
B) the short-haired cat was not pure-breeding.
C) the long-haired cat was not pure-breeding.
D) the long-haired cat was pure-breeding.
E) none of these could be determined with only two offspring.

Question

Quizplus · Accepted Answer

The fact that one long-haired kitten was produced indicates that the short-haired cat was not pure breeding and carried the recessive allele for long hair. This would make the genotype of the short-haired cat heterozygous (Ll). The genotype of the long-haired cat cannot be determined from this information, as it could be either heterozygous (Ll) or homozygous recessive (ll).

In Cats,short Hair (L)is Dominant to Long Hair (L); If