Scientists have discovered the oldest animal sex chromosome, and its age is truly staggering. Researchers have uncovered the octopus Z chromosome dating back around 380 million years and comes ...

In humans and many other animals, specific chromosomes determine sex. But how did researchers discover these so-called sex chromosomes? Throughout the many observations that led to this conclusion ...

The evolution of many chromosomal features—from 'wannabe centromere' knob elements in maize to even bona fide centromeres on plant and animal chromosomes—can be explained by this simple process.

Researchers aim to continue studying the role of the X chromosome in brain aging, and whether it can explain people’s risk of ...

Intriguingly, this is similar to the way animal sex chromosomes work, with two structural variants (X and Y chromosomes in humans and other mammals) kept roughly in balance. "There's a clear ...

Each replicated chromosome is made up of two identical strands called chromatids that are joined together. Each chromatid is a full length DNA molecule. The stages outlined in the following ...