GENEALOGY-DNA-L ArchivesArchiver > GENEALOGY-DNA > 2006-05 > 1147024758
From: "David" <>
Subject: RE: skin color [was Re: [DNA] Re: DNAprints Can someone help me..]
Date: Sun, 7 May 2006 13:59:18 -0400
Frances said "Do you have positive proof on all of your comments?"
What comments? The fact that exposure to UV allows the body to produce viatmin D? Or that the lack thereof will cause rickets? Or that UV exposure destroys folic acid and that a lack thereof is associated with neural tube defects? With a judicious use of Google, you should be able to find reputable sources.
As for what I took as your question "what about those babies born that have had no sun", remember all nutrients are provided by the mother while in vitro. The lack of adequate levels of vitamins or other necessary nutrients in the mother will be reflected in any developing fetus. That is why you hear those public service announcements (in the USA) telling women who plan on having children to be sure to get plenty of folic acid in their diets.
I would think it would be self evident that anything that affects the succesful birthing or viability of children, either positively or negatively, would have an affect on any population. I'm no statistician but, I believe small reproductive advantages/disadvantages will have a large effect on the population as a whole. A classic example is that of the peppered moth in England.