Figure 5. Allelic and genotypic frequencies at age conditioned on year class.

Spring spawning Atlantic cod at Iceland. Frequency of A allele, p _A (top panel row), and frequencies of AA, AB, and BB genotypes, f_AA, f_AB, and f_BB (panel rows 2–4 respectively). Panels represent year classes arranged most recent to older from left to right in each row. Points • represent observed frequencies; lines represent linear regression of frequency on age.