By LINDSEY TANNER
AP Medical Writer
CHICAGO (AP) -- Julio and Mauricio Cabrera are gay brothers who are convinced their sexual orientation is as deeply rooted as their Mexican ancestry. They are among 1,000 pairs of gay brothers taking part in the largest study to date seeking genes that may influence whether people are gay.
The Cabreras hope the findings will help silence critics who say homosexuality is an immoral choice.
If fresh evidence is found suggesting genes are involved, perhaps homosexuality will be viewed as no different than other genetic traits like height and hair color, said Julio, a student at DePaul University in Chicago.
Adds his brother, "I think it would help a lot of folks understand us better."
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