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If p and q are the only two alleles at a locus, then:

Ap - q = 1
Bp + q = 2
Cp + q = 1
Dp x q = 1
Answer & Solution
Correct answer: C. p + q = 1
1. Together they make up all alleles. 2. So p plus q equals one. 3. Genotypes follow p squared plus 2pq plus q squared. _Source: OpenStax Biology 2e, Chapter 19, The Evolution of Populations (CC BY 4.0)._
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