Gamete bias at fertilization and conceptus genotype frequencies. '+' and 'm' designate gametes that carry the wild-type or the mutant allele, respectively. Gamete frequencies are shown on the sides of the matrix, and conceptus genotype in the cells of the matrix. Each side of the matrix represents one of sexes in each mating. A. General case, where p and q denote alternative alleles. B. Arbitrary numbers were used to illustrate the consequences of gametic bias. Note that all eggs are fertilized and litter size remains unchanged in each scenario; only the genotypic ratio changes.
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