Homosexual men tend to have homosexual relatives on their mother's side of the family than on their father's side. the maternal relatives of homosexual men on the mother's side of the family produce offspring than do the maternal relatives of heterosexual men on the mother's side of the family.

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Explanation:

Homosexual men are more likely to have more homosexual relatives on family side of their mother's than on side of their father. On the mother's side,  maternal family members of homosexual men produce more offspring than maternal family member of heterosexual men on mother's side of family.

in other word - Homosexual men has more homosexual relatives on their mother's side than on the father's side of the family. Maternal parents of homosexuals produce more offspring than heterosexuals.