Race and Population Genetic Structure
Modern definitions of what constitute the distinct races of humanity are still rooted in taxonomic classifications first developed in 18th and 19th century Europe, before the later availability of many tools of modern science, in particular population genetics (see descriptions in the article Race (classification of humans). Part of the discussion surrounding the definition of "race" among human beings has overlapped in the past with debates regarding what constitutes a distinct species, known as the "species problem".
Since the 1960s a majority of scientists have come to understand the concept of race as a social construct mapped on to phenotypes in different culturally determined ways, and not as a biological concept. A 2000 study by Celera Genomics found that human beings largely have similar genetic input, and that citizens of any given village in the world, whether in Scotland or Tanzania, hold 90 percent of the genetic variability that humanity has to offer. The study found only .01% of genes account for a person's external appearance. Biological adaptation also plays a role in phenotype of bodily features and skin type. According to Luigi Luca Cavalli-Sforza, "Skin color and body size are less subject to genetic influence since they are also affected by exposure to the sun and diet, but there is always a hereditary component that can be quite important."
Read more about this topic: Race And Genetics
Famous quotes containing the words race and, race, population, genetic and/or structure:
“What is all wisdom save a collection of platitudes? Take fifty of our current proverbial sayings—they are so trite, so threadbare, that we can hardly bring our lips to utter them. None the less they embody the concentrated experience of the race and the man who orders his life according to their teaching cannot go far wrong.”
—Norman Douglas (1868–1952)
“The success of great scholars and thinkers is commonly a courtier-like success, not kingly, not manly. They make shift to live merely by conformity, practically as their fathers did, and are in no sense the progenitors of a nobler race of men.”
—Henry David Thoreau (1817–1862)
“The population of the world is a conditional population; these are not the best, but the best that could live in the existing state of soils, gases, animals, and morals: the best that could yet live; there shall be a better, please God.”
—Ralph Waldo Emerson (1803–1882)
“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 syntactic component of a grammar must specify, for each sentence, a deep structure that determines its semantic interpretation and a surface structure that determines its phonetic interpretation.”
—Noam Chomsky (b. 1928)