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(B) The study of mitochondrial $DNA$ $(mtDNA)$ variation has provided significant evidence regarding human evolution. Because $mtDNA$ is inherited mat

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There is more variation in Africa than in Asia.

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(B) The study of mitochondrial $DNA$ $(mtDNA)$ variation has provided significant evidence regarding human evolution. Because $mtDNA$ is inherited maternally and accumulates mutations at a relatively steady rate,it acts as a molecular clock. Research shows that human populations in Africa exhibit higher levels of genetic diversity compared to populations in other parts of the world. This higher genetic diversity in African populations suggests that they have existed for a longer period,supporting the 'Out of Africa' theory,which posits that modern humans ($Homo$ $sapiens$) originated in Africa before migrating to other continents.

There are two conflicting views regarding the origin of modern humans. One view suggests that the ancestors of modern humans in Asia are $Homo$ $erectus$. However,studies of $DNA$ variation suggest that the origin of modern humans is African. What does the observation of $DNA$ variation indicate?

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