Table 1.

 Fitness for each of three possible genotypes at the ith locus^a

	Genotype (autosomal, X-linked)
	AiAi, Ai	Aiai, –	aiai, ai
Female fitness (autosomal or X-linked)	1	1—sf, ihi	1—sf, i
Male fitness (autosomal)	1	1—sm, ihi	1—sm, i
Male fitness (X-linked)	1	–	1—sm, i

^aSelection and dominance coefficients are subject to the constraints: 0 < s_{f, i}, s_{m, i}, h_i < 1.