One piece of evidence that humans are evolving is the fact that we find healthy, fit people more attractive than the average person (think of people you don't already know who you would most like to have offspring with, say if you were marooned on an island - they are likely to have pretty good genes, right?). You might say, "AHA!, but why then are there any unattractive people at all?" The answer is the Shrek Effect - there are plenty of other unattractive people to pair up with. You might then say, "Hey, but that would lead to disruptive selection that would isolate the two extremes from sharing genes and lead to speciation!" My thought is that sexual reproduction is effective at mixing genes (recombination, etc), plus you do see a lot of people who get lucky with people out of their league.
What do you think?
I know this belongs in the biology section, but I like the group of people in R and S more. Over there it's like I'm helping everyone with their homework.
2007-01-30
16:42:05
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7 answers
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asked by
Tiktaalik
4
in
Society & Culture
➔ Religion & Spirituality
Cloe and Rae-Rae are alluding to the ability of sexual reproduction to "hide" bad genes in good-looking people and vice-versa.
2007-01-30
16:54:40 ·
update #1