Scenario D: Anthropologist have been studying Y-chromosomal DNA to understand where and when humans first appeared and when they moved into various areas of the world. The Y chromosome is found only in males, and most of the DNA found on the Y chromosome is passed directly from fathers to sons. Researchers collect Y-chromosomal DNA from living men and measure the amount of genetic difference among populations. Greater amounts of genetic difference indicate longer periods of separation between different groups of people because it takes time to accumulate genetic variations. This Y-chromosomal DNA research has helped anthropologist to understand our species' origin and Africa and our various migrations to other parts of the world.
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Biology, 21.06.2019 15:30
Galaxy whose shape seems different follow no set pattern are classified as
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In order to clone adult animals, scientists typically begin with a(n)
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Johannesburg kepler, an apprentice of brahe, believed in the heliocentric universe but rejected past astronomers belief in
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Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.
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Scenario D: Anthropologist have been studying Y-chromosomal DNA to understand where and when humans...
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