The genetic and the operative evidence relating to secondary sexual charactersMorgan, Thomas Hunt
Science
The genetic and the operative evidence relating to secondary sexual characters
Morgan, Thomas Hunt
Genetics; Poultry; Sex (Biology)
The two most obvious changes in the eunuch are the absence of the beard
and mustache and the small larynx, which produces a high-pitched voice.
In both these respects man differs from woman; in both, however, the
eunuch is like the boy as much as he is like the woman. It is not
evident, therefore, whether the eunuch has retained the juvenile
condition or has become more like the female. Moreover, there is the
possibility that there is no difference in the present case between
these two conditions. The distribution of hair on the pubis of the
eunuch is often said to be more like that in the woman than that in the
man, but there is apparently no sufficient evidence to show that this is
more than the juvenile condition or an undeveloped condition of the
male. As to the voice, there is no way of determining whether the voice
of the eunuch is feminine or juvenile. The development of the mammæ in
the eunuch would be a better test, but it does not appear from the
literature on the subject that the mammary glands and the nipples of the
eunuch are changed toward the female type. On the contrary, it appears
rather that there is no such change. It is true that the tendency toward
the accumulation of fat may give the eunuch a somewhat feminine
appearance (since one of the foci of fat accumulation is in the region
of the breasts), but this in itself can scarcely be claimed to be
feminization, but due rather to the more slothful habit of the eunuch
that tends to obesity.
A more suggestive resemblance is found in the narrowness of the shoulder
girdle and broadness of the hips in the eunuch, but even these
resemblances to the female should be regarded skeptically, since other
changes in the bones that result from castration are certainly not a
development toward the female type, but a peculiar specific effect of
the absence of testes on the growth of the bones. For instance, the
bones of the arms and legs are much longer in the eunuch than in either
the normal man or woman, in fact, more in the direction of the male, who
has longer legs than the female. The explanation usually given is that
the ossification at the ends of the bones and of the epiphyses does not
take place so soon as in normal men and women. The condition here is
that characteristic of the juvenile state that is carried over into the
adult, but whether the narrowness of the chest and shoulder girdle of
the eunuch is correlated in some way with the more prolonged growth of
the other bones has not, so far as I know, been determined. That there
is no _apparent_ connection between the shortness of the one and the
greater length of the other does not necessarily lead to the conclusion
that there is no such connection. For the present I think we must hold
this point in reserve.
Public-domain text, read in full here on John Shaqi.
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