A very large population of randomly-mating bunnies exists near the foothills of a local town. A hiker notices that the vast majority of the bunnies have fluffy, white tails. However, the hiker also spots some bunnies with fluffy, grey tails. White tails are dominant to grey tails. The hiker counts all of the bunnies in the foothills (because he clearly ran out of other things to do in life) and finds that out of 720 bunnies only 35 have grey tails. Using this information calculate a) the allele frequencies and b) the genotype frequencies for this population

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MrRoyal MrRoyal · Answer 1 · 2022-03-24T15:44:09+01:00

The allele frequency of the white and grey tailed bunnies can be represented as fractions or decimals

The allele frequency for white tails is 0.95, while the allele frequency for grey tails is 0.05
The genotype frequencies for white tails is 0.95, while the genotype frequencies for grey tails is 0.05

The given parameters are:

Bunnies = 720

Grey tails = 35

Since the white tails are dominant to grey tails, then we have:

White = AA = 685 i.e. 720 - 35

Grey = aa = 35

Both = Aa = 0

The frequency of white allele is calculated as:

[tex]White = \frac{AA + 1/2 Aa}{Total}[/tex]

So, we have:

[tex]White = \frac{685 + 1/2 * 0}{720}[/tex]

[tex]White = \frac{685}{720}[/tex]

[tex]White = 0.95[/tex]

The frequency of the grey allele is calculated as:

Grey = 1 - White

So, we have:

[tex]Grey = 1 - 0.95[/tex]

[tex]Grey = 0.05[/tex]

Since none of the bunnies have grey and white tail, then the genotype frequencies are the same as the allele frequencies.

So, we have:

White = 0.95

Grey = 0.05

Hence, the genotype frequencies for white tails is 0.95, while the genotype frequencies for grey tails is 0.05

Read more about genotype frequency at:

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