Are IQ tests relevant and or meaningful?

[Mehmentum]

IQ tests are a measure of one narrow type of intelligence.  IQ is usefull for some things, but just because someone has a better IQ than someone else, doesn't mean they are 'smarter' than every, or even necessarily most aspects.

As for the effects of genetics vs. environment IQ is an odd case.  For children, heritability (measured on a 0 to 1 scale, where 0 is completely determined by the environment, and 1 is completely determined by genetics) is .45, while for adults it is .7 to .8.  Meaning as people grow older, people tend to revert back to their genetics as opposed to their upbringing.  It isn't clear why this is.

Note: Heritability is determined by twin studies, how different are the IQs of identical twins separated at birth?  Separated at birth twins are pretty essential for studying human genetics.

[Mehmentum]

As for the effects of genetics vs. environment IQ is an odd case.  For children, heritability (measured on a 0 to 1 scale, where 0 is completely determined by the environment, and 1 is completely determined by genetics) is .45, while for adults it is .7 to .8.  Meaning as people grow older, people tend to revert back to their genetics as opposed to their upbringing.  It isn't clear why this is.

Do you have a background in this subject matter?  Would you marry a girl with a "low IQ"?  That's a serious question.  I've found myself increasingly less comfortable dating women that are not well educated and upwardly mobile.  I wonder if I am being irrational.  By well educated I mean graduate school or a serious undergraduate degree.

I'll have a Bachelor's degree in Biochemistry by next weekend, we covered this exact subject in a human genetic's class, actually.  As for marriage, I'm not going to ask girls for their IQ, but being able to hold an intelectual discussion as equals is a must for me in a romantic relationship.