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Description
A tiny scrap of genetic information determines our sex; it also consigns many of us to a life of disease, directs or disrupts the everyday working of our bodies, and forces women to live as genetic chimeras. The culprit--so necessary and yet the source of such upheaval--is the X chromosome, and this is its story. An enlightening and entertaining tour of the cultural and natural history of this intriguing member of the genome, The X in sex traces the...
Author
Description
This book examines the biological roots of human sexual behavior. It puts forward the case that the diversity of human sexuality can best be understood in terms of the development, structure, and function of the brain circuits that produce it. Discarding preconceptions about the motivation and purpose of sexuality, LeVay discusses the scientific evidence bearing on such questions as why we are sexual animals, what the brain mechanisms are that produce...
Description
A baby's gender is determined at the time of conception when a sperm cell containing either an X or a Y chromosome fertilizes an egg cell. An X from the father means the baby will be a girl, and a Y means it will be a boy. Although the fetus' sex is determined at conception, the external sexual organs do not develop until month 4 of pregnancy. At week 7 after conception the fetus appears sexually neutral, looking neither male nor female. Over the...
Author
Description
"Human genomes are 99.9 percent identical-with one prominent exception. Instead of a matching pair of X chromosomes, men carry a single X, coupled with a tiny chromosome called the Y. Tracking the emergence of a new and distinctive way of thinking about sex represented by the unalterable, simple, and visually compelling binary of the X and Y chromosomes, Sex Itself examines the interaction between cultural gender norms and genetic theories of sex...
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