Finally, the work presented here is of potential interest to evolutionary biologists as it provides additional
support in human females for the concept of long - term fitness benefit through reproduction.
Consistent with that result, the researchers found that certain regions of the X chromosome
in human female B cells, including regions that contain immunity - related genes, were expressed at higher levels than male cells.
Of the 68 genes specific to females, many were related to immunity, and at least two are known to be
overexpressed in human female B cells compared to male B cells.
«However,
whereas in human females the masculine characteristics are less common within the population, in fence lizards, we see the opposite pattern: About three quarters of the females are so - called «bearded ladies,» making masculinized females much more common than their counterparts with little or no blue ornamentation.»
According to Alfred Kinsey's famous adult dating study exhibited in his book «Sexual
Behavior in the Human Female,» 78 % of single men had orgasms in sexual encounters with a couple as compared with only 55 % for lesbian swingers.
It is not to be confused with
menstruation in human females, and you will rarely, if ever, see any signs of blood, although occasional mucous discharge may be evident.