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276<br />
ingrid holme<br />
terms of “doing” gender. Her concept of <strong>the</strong> performative gender draws<br />
on Foucault’s discussion of prisoners, in which he maintains that <strong>the</strong> law<br />
is not internalized, but incorporated. As Butler notes, <strong>the</strong> body does not<br />
express an inner sex/gender; ra<strong>the</strong>r it performs, both intentional and<br />
performative. So, drawing on <strong>the</strong> earlier example of sex registration at<br />
birth, one can see that <strong>the</strong> sexed body of a newborn infant incorporates<br />
<strong>the</strong> imposed sex, to develop <strong>the</strong>ir gender identity. To explore <strong>the</strong> idea of<br />
performativity of gender and sex, I draw on <strong>the</strong> fi eld of endocrinology<br />
where sex is viewed as relatively fl uid and capable of being perceived<br />
in terms of a body’s biological performance of sex. I <strong>the</strong>n contrast this<br />
with <strong>the</strong> current view of “genetic sex” as fi xed, which is based on <strong>the</strong><br />
idea that “sex” is an adult phenotype determined by an underlying genotype.<br />
Drawing on Butler’s notion of performativity, I suggest placing <strong>the</strong><br />
concept of “genetic sex” within <strong>the</strong> performance of “doing sex,” to show<br />
how genetic processes facilitate and enable <strong>the</strong> body in its “doing” of<br />
gender.<br />
Endocrinology and Genetic Sex: Fixed or Fluid?<br />
Genetic sex—<strong>the</strong> apparent fundamental biological cause of <strong>the</strong> two<br />
female and male human varieties—is a twentieth-century construct.<br />
Looking down <strong>the</strong> microscope, <strong>the</strong> stained chromosomes are concrete<br />
countable entities that lend <strong>the</strong>mselves easily to genetic determinism.<br />
Because <strong>the</strong> chromosomal composition of a person is generally fi xed<br />
at <strong>the</strong> time of conception, when a Y- or X-bearing sperm is united with<br />
<strong>the</strong> X-bearing egg, a person’s genetic sex is taken as permanent and<br />
unchanging throughout <strong>the</strong>ir life.<br />
Genetic sex, as a fi xed and static characteristic, contrasts with <strong>the</strong><br />
image of sex taken by endocrinology, where it seems more dynamic<br />
and fl uid. In endocrinology, sex and sex hormones account for <strong>the</strong><br />
wide variation in gender and gender roles that humans exhibit. As<br />
mentioned in <strong>the</strong> introduction, <strong>the</strong> distinction between <strong>the</strong> fi xed natural<br />
sex and fl uid social gender is often associated with feminism. However,<br />
in her study of sex hormones, Oudshoorn (1994) traces <strong>the</strong> origin<br />
of this distinction back to <strong>the</strong> research dispute between genetics and<br />
endocrinology over sexual development. She notes that during <strong>the</strong> 1910s<br />
physiologists suggested that <strong>the</strong> determination of sexual characteristics<br />
was affected by environmental and physiological conditions during<br />
<strong>the</strong> embryo’s development. Geneticists suggested, however, that sex<br />
was irrevocably fi xed at <strong>the</strong> conception by nuclear elements: <strong>the</strong> sex<br />
chromosomes (p. 21). The two research fi elds resolved <strong>the</strong> dispute by<br />
endocrinology limiting its study to sex differentiation (<strong>the</strong> biological