In the last 100 years, there have been several reported sightings in Southeast C

Question

In the last 100 years, there have been several reported sightings in Southeast China of Maltese tigers (also known as blue tigers), which have blue-grey fur. There is decent biochemical evidence to suggest such a tiger could exist, even if it is very, very rare.

1)Assume the maltese coat color is a recessive trait controlled by a single gene, and that the maltese allele has a frequency of 0.0012. What would be the expected frequency of the maltese genotype, and of the heterozygous carrier genotype?

2) if the estimated wild tiger population in Southeast China was 4,000 in the 1950s, how many maltese tigers would you expect in this population?

Explanation / Answer

Given, that maltese coat color is a recessive trait and its frequency (q) = 0.0012

Therefore, the frequency of other allele (p) = 0.9988

p2+2pq+q2 = 0.9976+0.00239+0.00000144

Thus, the expected frequency of the maltese genotype q2 = 1.44 x 10-6

The expected frequency of heterozygous carrier genotype 2pq = 2.39 x 10-3

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