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

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 ...

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 ...

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 ...

These organisms have independently evolved several important biological characteristics, such as multicellularity, complex life cycles, and sex chromosomes, from plants and animals. Brown algae ...

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.

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

In sexual reproduction—the way most life-forms procreate—each parent provides half an offspring’s chromosomes. Over generations, this mating and procreating shuffles the DNA deck ...