Hardy-Weinberg Principle Problem, help....?
A survey of a population of house cats finds that there are 80 black cats and 20 white cats in a population. Use the hardy-weinberg principle to find the frequency pf the black allele and the white allele in the population.
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I'm going to use the codes B for black and W for White, because I'm not sure which is dominant and which is recessive.
You take the percent of black and white alleles. That would equal to 80% black and 20% white. Now you multiply all possible combinations.
The formula is 1 = AA + 2Aa + aa or 1 = AA + Aa + aA + aa
B * B = (.80)(.80) = .64
B * W = (.80)(.20) = .16
W * B = (.80)(.20) = .16
W * W = (.20)(.20) = .04
.64+.16+.16+.04 = 1
So for 64% for BB, 32% for BW (or WB, they're the same thing), and 4% for WW.
That's just it.