2021 Jun 10, 9:24am
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Instead, it is explained as a paralleled evolution.
The human eye and the octopus eye are parallel evolution, but genetically extremely different.
The same environment that the herring and the smelt thrive in could lead to the same natural selection of that protein.
Maybe a better example would be human races. East Asians and Nordics did not evolve from each other, but both evolved white skin. Similarly, equatorial Africans and South Asians did not evolve from each other, but both have dark black skin
All races have a common ancestor so your premise is false.
If it is a single protein, pretty routine these days to check the DNA sequences for similarity and possible evolutionary alterations/mutations. Would any self respecting herring actually fuck a smelt? I don't think so.
Back in the early 2000s, Graham was studying AFPs under the direction of her lab leader Peter Davies when she was struck by the uncanny resemblance of the smelt protein’s gene to one of the antifreeze genes produced by herring. The genes’ introns — stretches of noncoding DNA, which generally mutate faster than coding regions — are more than 95% identical. “The only conclusion we could come up with was that the gene was transferred horizontally,” she said.
the gene was transferred horizontally
Would any self respecting herring actually fuck a smelt? I don't think so.
That is, the same skin color genes come to the forefront through natural selection