In humans and many other animals, specific chromosomes determine sex. But how did researchers discover these so-called sex chromosomes? The Sex of Offspring Is Determined by Particular Chromosomes ...

The human genetic blueprint is deceptively simple. Our genes are tightly wound into 46 X-shaped structures called chromosomes. Crafted by evolution, they carry DNA and replicate when cells divide, ...

As close as we’ve gotten to sequencing the entire human genome, there are still a few gaps. But now geneticists have plugged a major one in a landmark new study, by sequencing the entire human X ...

The Y chromosome is among the smallest in the human body and carries the fewest genes. Researchers are paying renewed attention to its role in cancer—specifically, what happens when it vanishes.

Robertsonian chromosomes are large chromosomes that form when the long arm of a chromosome breaks and fuses with another chromosome. They are the most common type of chromosome rearrangement in humans ...

Loss of the Y chromosome in aging men is widespread and increasingly linked to serious diseases, challenging assumptions that ...