Let’s start with some basic biology: in the nucleus of a human cell, each DNA molecule is packed into a long thread called a chromosome. Most human cells contain 23 pairs of chromosomes, with one half ...

Judges heard two cases Thursday over transgender girls playing sports in New Hampshire. The first hearing was about two trans ...

Two lawsuits about transgender girl athletes are being heard in federal court in New Hampshire. One case is challenging a state ban at schools and the other is about the right to protest transgender ...

The development of maternal egg cells is pivotal for survival—but also precarious. During meiosis, the DNA-containing ...

The science behind sex determination The process of determining a baby’s sex is purely biological. Humans have 23 pairs of chromosomes, including one pair that dictates whether a baby will be a boy or ...

Scientists at the Research Institute for Farm Animal Biology (FBN) in Dummerstorf have decoded the genome of the African ...

Breast tissue contains normal cells with genetic changes found in invasive breast cancers, which may guide future approaches ...

A new study finds that, in healthy women, some breast cells that otherwise appear normal may contain chromosome abnormalities typically associated with invasive breast cancer. The findings question ...