GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the short-haired animal was pure-breeding
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the short-haired animal was not pure-breeding
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the long-haired animal was not pure-breeding
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the long-haired animal was pure-breeding
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Detailed explanation-1: -If a short-haired animal of unknown genotype is crossed with a long-haired animal and they produce one long-haired and one short-haired offspring, the results would indicate that a, the short-haired animal was homozygous.
Detailed explanation-2: -Answer and Explanation: The genotype of the parent would be Ll. It is given that offspring with long hairs are more than the short hair.
Detailed explanation-3: -Short hair is due to a dominant gene (S) in rabbits and long hair is its recessive allele (s). A cross between a short-haired male and a long-haired male produced a litter of one long-haired and seven short-haired bunnies.
Detailed explanation-4: -In rabbits, black skin (B) is dominant over brown skin (b) and short hair (S) is dominant over long hair (s). If a homozygous black skin, short-haired male is crossed with a homozygous brown skin, long-haired female, all F1 offspring are heterozygous black and short-haired.
Detailed explanation-5: -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.