An additive model for the inheritance of height in the Potsdam Guards. In this example, the guards a

An additive model for the inheritance of height in the Potsdam Guards. In this example, the guards and their mates represent a subset of individuals in a population where height can range from 5 feet 9 inches (aabbcc) to 7 feet 3 inches (AABBCC). (a) Gametes produced by a 6 foot 9 inch male and a 6 foot 3 inch female. (b) Punnett square showing the 16 genotypic and 5 phenotypic combinations that result from fertilization of all combinations of gametes. The genotypes resulting in children who are as tall or taller than their father are noted. Most of the children will have a height intermediate to their parents, showing regression to the mean.