Some gender differences may be based on differences in rates of development. Some social and intellectual differences between males may be based on differences in rate of maturation. Swedish data on peer group change. Juvenile delinquency as an outcome may be based in part of rate differences in devel. of self control and degree of societal independence. Interesting example because tameness came about through selective breeding which led to hypothesis that tameness was A genetic.
Actual mechanism is based on relationship of period of socialization to human exposure.
If they overlap, they are tame. Above are examples of ontogenetic changes that are contingent on rate changes. There is good evidence that some phylogenetic changes may be due to rate changes. Major morphological changes can result from change in a single gene as in case of cell death in c.elegans that leads to p. redivivus and more clearly in the neoteny and allometric growth change examples whereby major morphological differences can be occasioned by altering a single gene. Effect was specific to when exposure occurred.