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4 major races. The world population can be divided into 4 major races, namely white/Caucasian, Mongoloid/Asian, Negroid/Black, and Australoid.This is based on a racial classification made by Carleton S. Coon in 1962 (in common usage the âËCapoidââ¢ and âËCongoidââ¢ groups classified by Coon is merged under âËNegroidââ¢).he United Nations, in a 1950 statement, opted to âdrop the term âraceâ altogether and speak of âethnic groupsâ. In this case, there are more than 5,000 ethnic groups in the world, according to a 1998 study published in the Scientific American. This fact is verified on: February 20, 2010.
If there is only a single pair of heterozygous pair of genes on each of the 2 pairs of chromoosomes, there are 8 million genetically different gametes possible. When crossing-over is involved the number of genetically different gametes goes up tremendously.