Question

1. in cats, long hair (l) is dominant over short hair (l). if two heterozygous long - haired cats are crossed, what are the possible genotypes and phenotypes of their kittens? what is the probability of getting a homozygous recessive kitten?

Explanation:

Step1: Determine the genotypes of the parents

The parents are heterozygous long - haired cats. The genotype of a heterozygous long - haired cat is \(Ll\).

Step2: Set up the Punnett square

	\(L\)	\(l\)
\(l\)	\(Ll\)	\(ll\)

Step3: Identify genotypes and phenotypes

• Genotypes: \(LL\), \(Ll\), \(ll\)
• Phenotypes: \(LL\) and \(Ll\) have long hair (because \(L\) is dominant), \(ll\) has short hair

Step4: Calculate the probability of homozygous recessive (\(ll\))

There are 4 possible outcomes in the Punnett square. The number of \(ll\) outcomes is 1. So the probability \(P=\frac{1}{4}= 0.25\)

Answer:

• Genotypes of kittens: \(LL\), \(Ll\), \(ll\)
• Phenotypes of kittens: Long - haired (\(LL\) and \(Ll\)), short - haired (\(ll\))
• Probability of homozygous recessive kitten: \(25\%\)