When couples have trouble conceiving a baby or lose a pregnancy, they often undergo routine tests, which can turn up a shock: One of the prospective parents may be missing a chromosome. The most ...

Around 1 in 500 men carry an extra X or Y chromosome, according to a large study published this week in Genetics in Medicine. But most of those affected are unaware of their status, despite it ...

Holly has a degree in Medical Biochemistry from the University of Leicester. Her scientific interests include genomics, personalized medicine, and bioethics.View full profile Holly has a degree in ...

A microscopic piece of genetic material known as the Y chromosome made headlines last week. It is nothing new or rare; every man has one in practically every cell, or he would not be a man. But a few ...