Organic acids are ubiquitous throughout the field of chemistry. Whether used as a solvent, a substrate, a strong acid, or in a catalytic amount as a Bronsted acid source, organic acids are as commonplace as glassware for the researcher.
In the equation, p 2 represents the frequency of the homozygous genotype AA, q 2 represents the frequency of the homozygous genotype aa, and 2pq represents the frequency of the heterozygous genotype Aa. In addition, the sum of the allele frequencies for all the alleles at the locus must be 1, so p + q = 1.
When there are two alleles at a locus, the convention is to use p to represent the frequency of one allele and q to represent the frequency of the other. Thus p, the frequency of the CR allele in this population, is 0.8. The frequency of the CW allele, represented by q, is 0.2.