Question

Two cats are mated. One of the parent cats is long-haired (recessive allele). The offsprings produced contain two short-haired and three long-haired kittens. What does the second parent look like, and what is its genotype? Use a genetic diagram

Answer 1

Answer:

From problem 1 you already know the dominance here. Go ahead and use the same symbols.

Mating: ll X ??

Gametes: Only l ?

Offspring: Short haired: Ll

Long-haired: ll

Since the known parent is ll, it contributes a recessive allele to all offspring. So the final phenotype of

the kittens is actually determined by the unknown parent. Since some of the kittens are short-haired, they

must have received the dominant allele from this unknown parent. The kittens who are long-haired must

have received the recessive allele from the unknown parent. So that parent must be Ll, and must be

short-haired.