There are two opposing views about the origin of modern man According to one view Homo Erectus in Asia were the ancestors of modern man. A study of variation of DNA, however, suggested African origin of modern man. What kind of observation of DNA variation could suggest this?
There are two opposing views about the origin of modern man According to one view Homo Erectus in Asia were the ancestors of modern man. A study of variation of DNA, however, suggested African origin of modern man. What kind of observation of DNA variation could suggest this?
The correct option is A Greater variation in Asia than in Africa
There are two models about the origin of modern man (Homo sapiens sapiens).i.e.
(i) Multiregional model: According to this view. Modern humans evolved in many parts of the world from regional descendants of Homo erectus who dispersed from Africa between 1 and 2 million years ago.
(ii) Monogenesis model: According to this view, only African descendants of Homo erectus gave rise to modern humans. In late 1980s Rebecca Cann and other geneticists supported this view on the basis of DNA of living humans. They compared the mitochondrial DNA (mtDNA) of a multiethnic sample of more than 100 people representing four continents. The greater the difference between the mtDNA's of two peoples, the longer ago that mtDNA's diverged from a common source. By using bioinformatics, they concluded that the divergence of mtDNA of Africans from common source began just 200, 000 years ago, much too late to represent the dispersal of Homo erectus. Thus there is greater variation in Asia than in Africa.
Greater variation in Asia than in Africa
There are two models about the origin of modern man (Homo sapiens sapiens).i.e.
(i) Multiregional model: According to this view. Modern humans evolved in many parts of the world from regional descendants of Homo erectus who dispersed from Africa between 1 and 2 million years ago.
(ii) Monogenesis model: According to this view, only African descendants of Homo erectus gave rise to modern humans. In late 1980s Rebecca Cann and other geneticists supported this view on the basis of DNA of living humans. They compared the mitochondrial DNA (mtDNA) of a multiethnic sample of more than 100 people representing four continents. The greater the difference between the mtDNA's of two peoples, the longer ago that mtDNA's diverged from a common source. By using bioinformatics, they concluded that the divergence of mtDNA of Africans from common source began just 200, 000 years ago, much too late to represent the dispersal of Homo erectus. Thus there is greater variation in Asia than in Africa.
