1. Determine how many alleles are present in the population for a given gene. If you're conducting your own experiment, you'll need to take a sample of the population and identify
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You can calculate Allelic frequency by using a formula postulated by Herdyweinberg. (p+q)2 = p2+2pq+q2.
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If 170 are Rh then 170/400 or 0.4254 had the phenotype dd. Therefore, the frequency of d is sqrt 0.425 = 0.6519. The frequency if D is 1  0.6519 = 0.3481. The frequency of DD =
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Allele, or gene, frequency measures how common an allele is in a
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