The Descent of Man

pear late in life in one sex are transmitted exclusively
to the same sex. From the fact of the
above abnormal peculiarities becoming attached
to one sex, long before the sexual functions
are active, we may infer that there must
be some difference between the sexes at an extremely
early age. With respect to sexuallylimited
diseases, we know too little of the period
at which they originate, to draw any safe
conclusion. Gout, however, seems to fall under
our rule, for it is generally caused by intemperance
during manhood, and is transmitted from
the father to his sons in a much more marked
manner than to his daughters.
In the various domestic breeds of sheep, goats,
and cattle, the males differ from their respective
females in the shape or development of their
horns, forehead, mane, dewlap, tail, and hump
on the shoulders; and these peculiarities, in
accordance with our rule, are not fully developed
until a rather late period of life. The sexes