On May 4, 12:09 am, raven1 <quoththera...@nevermore.com> wrote:
> On Sun, 3 May 2009 18:11:29 -0700 (PDT), "Rita B. Flesh"
>
> <vintage_man...@yahoo.com> wrote:
> >Men are truly worthless creatures and I don't understand why
> >50% of the population are men.
>
> Because a father has a 50/50 chance of giving an x or y chromosome to
> the offspring, which determines the gender. Pretty simple, no?

Sex ratio:
at birth: 1.05 male(s)/female
under 15 years: 1.04 male(s)/female
15-64 years: 1 male(s)/female
65 years and over: 0.75 male(s)/female
total population: 0.97 male(s)/female (2009 est.)
https://www.cia.gov/library/publications/the-world-factbook/geos/us.html