The maternal immune hypothesis suggest that a male child could be predisposed to homosexuality when
a. his H-Y antigens cause his mother to release too much estrogen, exposing his fetal brain to feminization.
b. his mothers antibodies attack his H-Y antigens, preventing the fetal brain from developing male-typical brain structures.
c. a fetus develops an immunity to the effects of maternal testosterone, preventing masculinization of his brain.
d. his mother is exposed to certain vaccines that increase her immune response, preventing certain fetal structures that are central to a masculine brain from developing.
Question 2There are a number of environmental theories suggesting that childhood experiences contribute to the cause of same-sex sexual attraction. The textbook concludes that
a. No matter how hard researchers have looked, theyve found no childhood events or activities that are reliably related to later bisexual, lesbian or gay attractions in adults.
b. A good deal of evidence points to several early childhood events that may contribute to becoming gay, but not to becoming bisexual or lesbian.
c. Several recent studies point to indications that early childhood experiences may contribute to one becoming lesbian, but not bisexual or gay.
d. There is a good deal of sound, recent research that points to several childhood factors that likely contribute to gay, lesbian, and bisexual development.
Question 3All of the following are pieces of evidence that support the maternal immune hypothesis as a part of the cause of same-sex attraction in males EXCEPT
a. Anti-H-Y antibodies in utero have been shown to disrupt brain development, but not physical development.
b. H-Y antigens cannot cross the blood-brain barrier, thus increasing their concentration in the fetal brain.
c. Cytology research shows that the maternal immune response is greater to cells from male than female children.
d. Newborn boys with older brothers tend to have a lower birth weight than boys with older sisters.
Question 4The observation that there is a tendency for gay men to have a larger number of older brothers than nongay men is known as the _____________ effect.
a. LeVay
b. fraternal birth order
c. sibling
d. maternal auto-immune
Quick Reply
