"Yet science cannot be used to apply value judgments to its results."

p. 32.

"Some primordial sexual organs start off unsexed (the gonads), some are supplied in both male and female form (the tubes), and some come in a basic female model with an option to modify to a male variant (the genitals)."

p. 31.

The actual physical entity that causes all this upheaval is a little nugget of life called the X chromosome, and this is its story."

p. 2.

David Bainbridge, The X in Sex: How the X Chromosome Controls our Lives, (Cambridge: Harvard University Press, 2003).