January 24, 2017

Homework Help: Biology

Posted by Joe on Monday, January 28, 2013 at 2:43pm.

In a population of jaguars, a gene with two alleles encodes the fur color. Allele B causes melanism (dark fur) and is dominant over allele b, which results in light colored fur. Suppose that there is a migration event, producing a population with 60% BB, 20% Bb and 20% bb individuals. If we assume Hardy-Weinberg equilibrium for future generations, what would the genotypes frequencies be after 5 generations?

So the answer is 49% BB, 42% Bb, 9% bb.
But I'm confused. So BB which is p^2 = .6. Square rooting .6 is rougly .775 so P = .775. this means that Q = .225

but the answer has P = .7 and Q = .3

I know that you get the answer by finding P + 1/2pq for allele frequency of P, but how come it isn't the same as the other method of finding the answer?

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