Question

in a population of cats, the gene for long hair (h) is dominant and the gene for short hair (h) is recessive. a breeder crosses a heterozygous long - haired male with a homozygous short - haired female. in a litter of four kittens, what percentage should the breeder expect to have long hair? 25% 50% 75% 100%

Explanation:

Step1: Determine genotypes of parents

The male cat is heterozygous long - haired, so its genotype is Hh. The female cat is homozygous short - haired, so its genotype is hh.

Step2: Fill in Punnett square

The possible gametes from the male are H and h, and from the female are h and h. Filling the Punnett square gives us the following genotypes of offspring: Hh, Hh, hh, hh.

Step3: Calculate long - haired percentage

Out of 4 possible genotypes of offspring, 2 have the H allele (which gives long hair as H is dominant). So the percentage of long - haired offspring is $\frac{2}{4}\times100\% = 50\%$.

Answer:

50%