Taresian
History:
Technologically sophisticated, spacefaring, humanoid civilization in the Delta Quadrant. The
Taresian population was ninety percent female because male children were very rare. To assure an adequate childbirth rate, The
Taresians genetically engineered a retrovirus that they placed on several planets in the Delta Quadrant. The retrovirus was designed
to alter the DNA of a male host's body, mutating it into a Taresian being. The retrovirus also imparted an instinctive urge to
return to Taresia so that their bodies could be denucleated.
VOY "Favorite Son" ; Star Trek Encyclopedia II
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