Little Lilly is preoccupied with pointing at things and asking what they are. She is a toddler who is experiencing

What do your authors conclude about the cause of homosexuality?

A) Homosexuality must have a biological base. B) Homosexual individuals have poor relationships with parents. C) People choose to be homosexual. D) Scientists still don't know for sure what causes homosexuality.

One of the characteristics of Lesch-Nyhan syndrome is that

A) it only occurs in girls because it is a recessive trait requiring two X chromosomes. B) it only affects boys since the genetic mutation is found on the Y chromosome. C) nearly all children who develop the disorder have severe, chronic self-injurious behavior. D) as with phenylketonuria, children require a strict dietary regimen until age 8 to prevent intellectual disability.