Re:Forearm artery reveals human evolution continues?
by SamReidHughes on Saturday October 10, 2020 @11:52PM
(#24743585)
Let's assume the research is sound. (Inferring from mci's comment, probably not.) But let's suppose we saw this phenomenon in a specific country's population, measured without any sampling bias. It could be from:
- selection pressure for some other trait that happens to involve some genetic material that affects the forearm arteries.
- the recent removal of strong selection pressure for having two arteries, on a trait that generally tends to drift towards three arteries in many directions.
- a dominant gene isolated to one province, which then got diluted across the population when people traveled more.
- a trait found more often in the rural population, which over the past century had more children.
- selection pressure for some other trait that happens to involve some genetic material that affects the forearm arteries.
- the recent removal of strong selection pressure for having two arteries, on a trait that generally tends to drift towards three arteries in many directions.
- a dominant gene isolated to one province, which then got diluted across the population when people traveled more.
- a trait found more often in the rural population, which over the past century had more children.