Anke A.
Ehrhardt of Columbia and June M. Reinisch of the Kinsey Institute, Kimura says, have found that these girls "grow up to be more tomboyish and aggressive than their unaffected sisters." Sheri A. Berenbaum of the University of Chi- cago and Melissa Hines of UCJA found that when such girls are given a choice of toys, they opt for cars and trucks, "the more typically masculine toys.'
Kimura believes that the apparent sex differ- ences "arose because they proved evolution-...