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13 February, 06:35

1. Two years after the above frequencies were calculated, a biologist reexamined the cat population and counted 153 short-haired homozygotes, 568 shorthaired heterozygotes, and 397 long-haired cats. What are the frequencies of each allele now?

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  1. 13 February, 08:20
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    The new frequencies are 0.39 for short hairs and 0.61 for the long haired.

    Explanation:

    The total population is given as 153+568+397=1118

    S is given as the short haired, s is given as the long haired so ss is the short haired homozygotes and Ss is the shorthaired heterozygotes.

    As there are 1118 cats, then the gene pool has 2 x 1118 alleles for hair length = 2236 alleles f (S) = (2SS + Ss) / total alleles = [ (2 x 153) + 568] / 2236 = 0.39 f (s) = (2ss+Ss) / total alleles=[ (2 x 397) + 568] / 2236 = 0.61
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