A longhair cat (LL) is crossed with a shorthair cat (LL) resulting in medium length hair (LL) in ALL offspring. If a cat with medium length hair (LL) is crossed with a longhair (LL) cat, what percentage of the offspring can be predicted to have short hair (LL)? Show your Punnett square on paper. (3B3)

GENETICS AND DISEASE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A longhair cat (LL) is crossed with a shorthair cat (L’L’) resulting in medium length hair (LL’) in ALL offspring. If a cat with medium length hair (LL’) is crossed with a longhair (LL) cat, what percentage of the offspring can be predicted to have short hair (L’L’)? Show your Punnett square on paper. (3B3)

A	0%
B	25%
C	50%
D	100%

Explanation:

Detailed explanation-1: -Getting to know the history of the Domestic Longhaired means getting to know their genes. 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.

Detailed explanation-2: -From the result of the punnet square, we were able to determine that a homozygous long-haired cat (ss) that is mated with a heterozygous short-haired cat (Ss) may have a 75% chance of having heterozygous short-haired kittens and a 25% chance of having long-haired kittens.

Detailed explanation-3: -The genotype of the parent would be Ll. It is given that offspring with long hairs are more than the short hair.

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.

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GENETICS AND DISEASE