SRY

SRY is not the only, or even most common sex-determining gene in mammals (linked to determining males). Most non-primate mammals use the Y chromosome gene UBE1 for the same purpose.

Two species of "mole voles", Ellobius tancrei and E. lutescens , have lost the Y chromosome entirely. In one species, both sexes have unpaired X chromosomess; in the other, both females and males have XX.

Other meanings

SRY is a TLA that could mean:

• Sorry (Internet slang)
• Southern Railway of British Columbia