This applet illustrates how mating and transmission properties of a population can be inferred from mother-offspring combinations.
The rows refer to the offspring of different mothers. The columns labeled “AA”, “Aa”, and “aa” are the offspring genotypes. The cells in these columns contain the number of mother-offspring genotype combinations observed. Only the non-zero cells in these columns can be edited. The default values are derived from:
Christiansen, F. B. 1980. Studies on selection components in natural populations using population samples of mother-offspring combinations. Hereditas 92:199-203.
Values in the remainder of the table are calculated from those in the first three columns of “data.” The column labeled “Total” refers to the total number of mothers with that genotype (assuming that only one offspring is sampled per mother), and the column labeled “x” is the corresponding genotype frequency. The column labeled “A” is the inferred number of A gametes donated by fathers, and “a” is the inferred number of a gametes donated by fathers. “p” is the frequency of A in paternal gametes.