Figure 2.—

Observed frequencies of females in 55 half-sib families of European sea bass and expected frequencies under a threshold model with 18.3% females in the offspring and 38% environmental variance, where the genetic component of the underlying variable is (a) polygenic; (b) one biallelic locus with p = 0.6 for the masculinizing allele, q = 0.4 for the feminizing allele; and (c) two biallelic loci with p = q = 0.5.