What Are 3 Lines Of. Genetic Evidence That Would Relate To The Recent Origins OF Modern...

What Are 3 Lines Of. Genetic Evidence That Would Relate To The Recent Origins OF Modern Humans??? Which One Does Evidence Support The Most??

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Q)

Current genomic evidence support single out of Africa migration of modern humans. - Mitochondrial eve. The origin of modern DNA in the mitochondria has been traced back to just one African woman. She lived between 50000 to 500000 years before - mitochondrial eve. Mitochondrial DNA comes solely from our mother. This is because egg contains large amounts of mitochondrial DNA. Sperm contains very low amount. Once fertilization happens all sperm mitochondria are destroyed. So mitochondrial DNA is conserved for generations without recombinations. Similarly Y chromosome is passed from father to son, this also support out of Africa model.
Genetic sequencing of Neanderthals were done. The genome sequence suggested that early non African modern humans interbred with now extinct ancient human cousins.
Now a days many of us carry a small fraction of DNA from our archaic Neanderthal and Denisovan ancestors. Scientists have found 9 neanderthal genes in living humans known to be associated with susceptibility to conditions such as type 2 diabetes mellitus.
Genetically 7 billion people living all over the world differ little from homo sapiens that ventured out of Africa.

Q)

Mitochondrial eve theory is the most supportive evidence. This is because mitochondrial DNA is most conserved. Errors by microbial mix up can be avoided in evaluating mitochondrial DNA.

gladiator answered 2 years ago

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