A working group at the National Institute for Mathematical and Biological Synthesis (NIMBioS), based at UT, used mathematical modeling that found the transmission of sex-specific epi-marks may signal homosexuality.

According to the study, published online today in The Quarterly Review of Biology, sex-specific epi-marks, which are "erased" and thus normally do not pass between generations, can lead to homosexuality when they escape erasure and are transmitted from father to daughter or mother to son.