Which finding is supported by research evidence regarding the relationship between genetics and sexual orientation?
◦ Gay men and lesbians tend to have a larger proportion of heterosexual siblings than heterosexuals do.
◦ Gay men tend to have more homosexual relatives on their mother's side of the family than on their father's side.
◦ The same genetic pattern is found in 90 percent of gay men and 85 percent of lesbians tested to date.
◦ Gay brothers share a gene in common on the Y chromosome, even though other genes on that chromosome differ.