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# Problem: In domesticated cats, the following genetic patterns have been described as independently assorting. Normal ears (T) is dominant to tufted ears (t); curved whiskers (C) is dominant to straight whiskers (c); the presence of six toes (S) is dominant to five toes (s); and the gene for hair length is an X-linked codominant. The three phenotypes for hair length are long (XHXH), medium (XHXh), and short (XhXh); medium is the heterozygous condition. Sex determination in cats is the same as for humans (XX = female).Given two parent cats:Tt cc SS XHXh x Tt Cc Ss XHYi) How many different gametes could be formed in the female cat with respect to these four traits?ii) How many phenotypes are possible in the offspring from this mating?iii) What fraction of the offspring will have tufted ears, curved whiskers, six toes, and long hair?iv) In a litter of 10 kittens, six are male. How many of the males would be expected to have tufted ears, six toes, straight whiskers, and medium-length hair?

###### Problem Details

In domesticated cats, the following genetic patterns have been described as independently assorting. Normal ears (T) is dominant to tufted ears (t); curved whiskers (C) is dominant to straight whiskers (c); the presence of six toes (S) is dominant to five toes (s); and the gene for hair length is an X-linked codominant. The three phenotypes for hair length are long (XHXH), medium (XHXh), and short (XhXh); medium is the heterozygous condition. Sex determination in cats is the same as for humans (XX = female).

Given two parent cats:

Tt cc SS XHXh x Tt Cc Ss XHY

i) How many different gametes could be formed in the female cat with respect to these four traits?

ii) How many phenotypes are possible in the offspring from this mating?

iii) What fraction of the offspring will have tufted ears, curved whiskers, six toes, and long hair?

iv) In a litter of 10 kittens, six are male. How many of the males would be expected to have tufted ears, six toes, straight whiskers, and medium-length hair?

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Based on our data, we think this problem is relevant for Professor Bayer's class at UCF.