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Hi My friend and I get 2 different answers to this question. I would like to know how to calculate the value of q. My friend says that 500/1500=q because there are 500 recessive alleles in the population and there are 1500 alleles in total. I say that p2= 500/1500 and P is the square root of that value and q+p=1 but we both get different answers. Please let me know which way is correct. Thank you guys in advance

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marked as duplicate by Remi.b genetics Jul 3 at 2:11

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P=(250 × 2 + 500)/1500 = 0.66 Q=500/1500 = 0.33 Your friend was right, you miscalculated P because forgot to add the alleles coming from the heterozygotes.

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