Since there is no such thing as simultaneous evolution of many individuals in the same species, to accept this you must believe that ALL fair skinned Europeans descended during the past 6 to 10,000 years from a single individual who had a (recessive) gene mutation, or from two individuals who had simultaneous gene mutations, for light pigmentation.
Then these individuals and their offspring out-competed all of the dark skinned individuals, whose progeny either died out or simply left for sunnier locales. And during all of this, the light skinned people avoided breeding with the dark individuals who had dominant pigmentation genes.
Just so we all understand what we have to swallow to accept this evolutionary hypothesis.
It is a bit much. The mutation rate of life takes simply ages, not a single generation or just two people can change a whole segment of the population.
Except you’ve got it wrong.
Yeah, sorry, no. Gene flow can happen with extraordinary rapidity. This hypothesis is perfectly plausible. Whether it's true or not I can't say. But you should read up more on gene flow.
Let’s say you have a population of 100,000. Everybody has two kids, so the population is stable. The average age of the mother at the time of giving birth is 20 years. I’m thinking what a prehistoric population would have been like.
A woman gets a mutation. How long until nearly the entire population is decended from her and thus has a chance to get the mutation, assuming people are intermarrying among the whole population? By my math, it would take at least 330 years but definitely not more than 400 years. The woman would have 2 descendants in 20 years and 4 in 40 years and 8 in 60 years and so on. After 340 years, she would have 130,036 descendants. That’s more than the total population, so we would have to assume relatives marrying each other, but she would still likely have nearly all the population as her descendants.
In reality, if the gene were favorable to survival, and people had significantly more than 2 children in the family, it could happen a lot quicker.
In a 6,000 year period, genes can spread out pretty widely.
Thanks for the reality check on this hyped up pseudo science.
No doubt it was difficult finding dates back then.