Among individuals with abnormalities in their sex chromosomal makeup (extra or missing chromosomes), which of the following is true?
a Such individuals usually do not survive infancy.
b As long as there is at least one Y chromosome present, the body type will tend to develop as male unless some later factor interferes.
c As long as there is at least one X chromosome present, the body type will tend to develop as female unless some later factor interferes.
d Such individuals are always identifiable at birth by their appearance.