THE ODDS OF A
MAN BEING GAY
INCREASE BY
33%
for every additional older
brother that he has
15%
can attribute
their homosexuality to
birth order
according to
research
of gay men
WHY WOULD BIRTH
ORDER BE A FACTOR?
A study published in the Quarterly Review of
Biology suggests that EPIGENETICS are the
biological driving force behind sexual
orientation.
EPI .... WHAT!???
Epigenetics are inheritable factors that regulate
DNA, switching genes on and off
Epigenetic changes have evolved
to benefit adults
but are sometimes passed to
their children.
Epigenetics may
be responsible
for the response
in mothers of
multiple sons.
After giving birth to
sons, the mothers body
may fight the production of another male
by “feminising” sexual
orientation.
Inherited epigenetic
markers may explain
why homosexuality
seems sometimes to
run in families, despite
the lack of a “gay gene”
confirmation
TWIN BROTHERS
IN A STUDY OF 400 SETS OF TWINS RESEARCHERS AT NORTHWESTERN UNIVERSITY FOUND GENE
MARKERS THAT MAY CONTRIBUTE TO SEXUAL
ORIENTATION
THIS STUDY FOUND THAT GAY MEN SHARE
GENETIC SIGNATURES ON PART OF THE
X-CHROMOSOME
XQ28
So the next time somebody asks, “how did
you become gay?”
you can confidently tell them ...
its in the genes.
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