Which of the following statements is true of individuals with Turner syndrome?

A) They are males with an XY chromosomal composition in the strictly genetic definition of sex.
B) They are born with an XO chromosomal composition.
C) They are highly likely to have problems with gender identity and gender typing.
D) They are females in whom the vagina, clitoris, and labia are absent.

Individuals with Turner syndrome are born with an XO chromosomal composition, meaning they have one X chromosome and no Y chromosome. This results in physical and developmental differences, such as short stature and infertility, but does not necessarily impact gender identity or sexual development. Option A is incorrect as individuals with Turner syndrome do not have a Y chromosome. Option C's statement is not supported by evidence. Option D describes a condition called Mayer-Rokitansky-Küster-Hauser syndrome, which is unrelated to Turner syndrome.