Question

Which trait is determined by both genetics and the environment?

Answer 1

Early humans did not understand the mechanisms of inheritance, of DNA, or of the translation of genetic information into morphology, physiology, or behavior. But they intuitively understood that inheritance shapes behavior. By controlling mating, herds and flocks of animals useful to humans were domesticated. The resulting domesticated animals — cattle, horses, and dogs — behave very differently than their wild progenitors. Selective breeding was a key insight in human history, even if the underlying science was not understood until the Darwinian and Mendelian revolutions in the nineteenth century. 



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