height and fertility

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Offline cheryl j

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height and fertility
« on: 17/11/2012 01:31:29 »
A couple of times I've seen the question come up here as to whether natural selection is still occurring in humans. An interesting article in Science Daily that says it is still occurring at least into terms of sexual dimorphism and height.

http://www.sciencedaily.com/releases/2012/11/121113083536.htm

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Offline CliffordK

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Re: height and fertility
« Reply #1 on: 17/11/2012 03:07:15 »
Interesting study.  Was it based on 1937 to 1938 data?  Could trends be changing? 

In particular, as we move from large families to one to three child families, perhaps the female hight might not be as representative of family size, other than perhaps ethnic differences (which could be a huge confounding variable).  Male hight, could still be involved though as not all men might father the same number of children.

A similar question I've been wondering.

What is the effect if tall men tend to marry tall women, and short men tend to marry short women.  Would that tend to cause an increase in the overall range of human heights?