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 ...

Watch the Video Click here to watch on YouTube Have you ever seen a zonkey? We typically think of zebras and donkeys as ...

Normally, people have 23 pairs of chromosomes; when someone is born with an extra copy of chromosome 21, it produces the effects of Down syndrome. Most animals can’t have Down syndrome ...

Neuroscience research has only recently begun to prioritize the inclusion of both male and female lab animals in studies.

Sometimes it’s easy to see when animals are stressed or anxious. They may pace back and forth, spend their days in hiding or be unusually aggressive. Getting sick frequently or ...

In humans and many other animal species, sex is determined by specific chromosomes. How did researchers discover these so-called sex chromosomes? The path from the initial discovery of sex ...

Scientists might have figured out why women live longer than men — linking it to having two X chromosomes, which defend ...

Some characteristics are controlled by a single gene, such as fur in animals and red-green colour ... its nucleus, chromosomes in the nucleus, and genes.