AP BIOLOGY

HEREDITY

INCOMPLETE DOMINANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In cats, long hair is recessive to short hair. A true-breeding (homozygous) short haired male is mated with a long-haired heterozygous female. What will their offspring look like? You may choose more than one answer.
A
50% long haired
B
50% short haired
C
100% short haired
D
100% long haired
Explanation: 

Detailed explanation-1: -In cats, long hair is recessive to short hair. A true-breeding (homozygous) short-haired male is mated to a long-haired female. What will their kittens look like? 100% Short haired because when SS is mated with ss all of the offspring have to be Ss.

Detailed explanation-2: -The gene carrying the long hair trait in cats is recessive. That means the result of a shorthaired cat mating with a longhaired will only be shorthaired kittens. However, if the shorthaired offspring were to mate with each other, a handful of longhaired kittens might be born.

Detailed explanation-3: -3 (a) A true-breeding, long-furred cat has the genotype ss.

Detailed explanation-4: -Cats with M1/M1, M2/M2, M3/M3, or M4/M4 genotype have long hair. They will transmit their long hair variant to all of their offspring. If bred to a long-haired mate, they will produce only long-haired kittens.

There is 1 question to complete.