Complex sentence: Sons were chosen to help the mother with domestic chores, these chores were strictly the work of women, because these boys were doing women's work they were raised as if they were female and dressed as girls.
Split into simpler sentences: Sons were chosen to help the mother with domestic chores. Since these chores were strictly the work of women, and because these boys were doing women's work, they were raised as if they were female and dressed as girls.