From the November RealBeer newsletter:

<< CHEAP DRUNK? WOMEN 'HOLD THEIR LIQUOR' BETTER
Research by scientists in Kentucky indicates that women are better at
"holding their liquor" than men. The study at the University of Kentucky
found men's loss of inhibition was three times greater than women's with the
same blood alcohol levels.
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They then tested their ability to hit a button at the right time when a
symbol flashed up. Participants had to hit a green button when a green symbol
flashed up. If a blue symbol appeared, they were told not to hit anything.
People became less able to prevent themselves hitting the green key when a
blue symbol appeared the more drunk they became. >>
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Perhaps the alcohol has nothing to do with it.

Color Blindness: More Prevalent Among Males

Some 10 million American men€”fully 7 percent of the male population€”suffer
from color blindness, but it affects only .4 percent of women. The fact that
color blindness is so much more prevalent among men implies that, like
hemophilia, it is carried on the X chromosome, of which men have only one copy.
(As in hemophilia, women are protected because they have two X chromosomes; a
normal gene on one chromosome can often make up for a defective gene on the
other.)