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Beyond X-X and X-Y 289<br />
ample room for playing or jamming <strong>the</strong> score differently in different<br />
contexts.<br />
The fact that a cell does not use all <strong>the</strong> genes in its genomes at once<br />
problematizes <strong>the</strong> concept of genetic sex as a static and fi xed object.<br />
An example of this is those X-X individuals who have <strong>the</strong> SRY (which is<br />
typically found on <strong>the</strong> Y chromosome) on one of <strong>the</strong>ir X chromosomes.<br />
Because <strong>the</strong> genes required for <strong>the</strong> typical male phenotype are not on<br />
<strong>the</strong> Y chromosome, this gene is able to activate typical male genetic<br />
processes in X-X cells and leads to a male phenotype. A notion of genetic<br />
sex related to <strong>the</strong> genetic process would appreciate <strong>the</strong> situation in terms<br />
of <strong>the</strong> person being a genetic male because <strong>the</strong>ir genetic processes<br />
are that of a typical male although his karyotype is nontypical male.<br />
Clearly, <strong>the</strong> concept of genetic sex is tightly linked within both society<br />
and science to <strong>the</strong> karyotype, and is thus extremely resistant to change.<br />
However, devising a concept of a living genomic sex, where <strong>the</strong> stress is<br />
placed on <strong>the</strong> genetic processes of <strong>the</strong> body, might be useful.<br />
Moving toward a concept of living genetic sex follows Fausto-Sterling’s<br />
(2000) call to recognize that nature and nurture cannot be separated.<br />
Within genomics, genetic processes cannot be separated from <strong>the</strong> cellular<br />
environment in which <strong>the</strong>y occur, nor can <strong>the</strong>y be separated from <strong>the</strong><br />
local (tissue) and global (body) biological environment that <strong>the</strong>y occur.<br />
One example that brings to light <strong>the</strong> typically hidden genetic processes<br />
that take place during puberty is 5 alpha-reductase defi ciency. This<br />
syndrome is caused by <strong>the</strong> body being unable to produce <strong>the</strong> enzyme<br />
5 alpha-reductase, which is needed to process testosterone into its<br />
stronger from, dihydrotestosterone. Numerous genes lead to <strong>the</strong> person<br />
being born with an X-Y karyotype and ambiguous female genitalia.<br />
Two genes have been shown to be implemented in <strong>the</strong> defi ciency, with<br />
more than 20 mutations having been characterized, again stressing <strong>the</strong><br />
inadequacy of focusing on <strong>the</strong> DNA sequence. Once <strong>the</strong> person reaches<br />
sexual maturity she is likely to begin developing male characteristics as<br />
<strong>the</strong>ir testis descend and <strong>the</strong>ir voice drops. Historically, scientists viewed<br />
<strong>the</strong>se individuals as genetically male, even in childhood. Because this<br />
condition may only be recognized when <strong>the</strong> child fails to menstruate,<br />
this can cause a confl ict between her self-identity and what science seems<br />
to say has been <strong>the</strong>ir “true” genetic sex. I argue that a view of genetic sex<br />
should be rooted in <strong>the</strong> body’s genetic processes, as opposed to being a<br />
characteristic dictated by <strong>the</strong> X and Y chromosomes. This would allow<br />
us to understand how <strong>the</strong> body responds and develops as novel genetic<br />
processes are set in motion, as well as <strong>the</strong> infl uence of hormones on<br />
existing genetic processes. This last infl uence is especially relevant in <strong>the</strong>