In cats, the allele for short hair (H) is dominant to the allele for long hair (h). A heterozygous short-hair cat is crossed with a long-hair cat. What percentage of the offspring is expected to be heterozygous for hair length?

50% of the offspring is expected to be heterozygous for hair length.

Explanation:

50% of the offspring is expected to be heterozygous for hair length.

Heterozygous short hair (Hh)

Long hair cat (hh)

When both of them are crossed they produces offspring with genes:

Hh, Hh, hh,  and hh

Hh - Heterozygous short hair

hh- dominant long hair.

So we can infer that 50% of the offspring (2 out of 4) is expected to be heterozygous for hair length, which is heterozygous short hair.

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