Cultural Influences On Genetic Evolution
Culture can profoundly influence gene frequencies in a population. One of the best known examples is the prevalence of the genotype for adult lactose absorption in human populations, such as Northern Europeans and some African societies, with a long history of raising cattle for milk. Other societies such as East Asians and Amerindians, retain the typical mammalian genotype in which the body shuts down lactase production shortly after the normal age of weaning. This implies that the cultural practice of raising cattle for milk led to selection for genetic traits for lactose digestion. Recently, analysis of natural selection on the human genome suggests that civilization has accelerated genetic change in humans over the past 10,000 years.
Read more about this topic: Biocultural Evolution
Famous quotes containing the words cultural, influences, genetic and/or evolution:
“To recover the fatherhood idea, we must fashion a new cultural story of fatherhood. The moral of today’s story is that fatherhood is superfluous. The moral of the new story must be that fatherhood is essential.”
—David Blankenhorn (20th century)
“Leadership does not always wear the harness of compromise. Once and again one of those great influences which we call a Cause arises in the midst of a nation. Men of strenuous minds and high ideals come forward.... The attacks they sustain are more cruel than the collision of arms.... Friends desert and despise them.... They stand alone and oftentimes are made bitter by their isolation.... They are doing nothing less than defy public opinion, and shall they convert it by blows. Yes.”
—Woodrow Wilson (1856–1924)
“We cannot think of a legitimate argument why ... whites and blacks need be affected by the knowledge that an aggregate difference in measured intelligence is genetic instead of environmental.... Given a chance, each clan ... will encounter the world with confidence in its own worth and, most importantly, will be unconcerned about comparing its accomplishments line-by-line with those of any other clan. This is wise ethnocentricism.”
—Richard Herrnstein (1930–1994)
“The evolution of sense is, in a sense, the evolution of nonsense.”
—Vladimir Nabokov (1899–1977)