In each cell of your body, DNA is stored in structures called chromosomes. When cells divide, these chromosomes are copied, ...

Published in Nature, researchers at the University of Pittsburgh School of Medicine and UPMC Hillman Cancer Center report a ...

It's tricky to make an exact copy of yourself. Or at least it is for cells undergoing mitosis, where cells replicate ...

Like mitosis, meiosis is a form of eukaryotic cell division. However, these two processes distribute genetic material among the resulting daughter cells in very different ways. Mitosis creates two ...

A juvenile rhesus macaque, a species of Old World monkeys. The rhesus macaque was one of 19 mammals included in a study reconstructing chromosome rearrangements during 105 million years of mammalian ...

Humans contain 46 chromosomes (23 from their mother, and 23 from their father) in each of their body cells. This image shows duplicated chromosomes from a human male. Summary Scientists at the Sloan ...

A human cell carries in its nucleus two meters of spiraling DNA, split up among the 46 slender, double-helical molecules that are its chromosomes. Most of the time, that DNA looks like a tangled ball ...

Merotelic kinetochore (single kinetochore attaches to microtubules from two spindle poles) has been proposed to be the major mechanism underlying the spontaneous formation of lagging chromosomes, ...

Triploidy is a condition that affects 1% to 3% of pregnancies. It’s when a developing baby has an extra set of chromosomes, the thread-like structures that carry DNA. A triploidy pregnancy usually ...

Prenatal genetic tests can detect sex chromosome aberrations, but what happens after—for families and children—is anything but clear. When Ollie’s mother, Katie, was nine weeks pregnant, her ...

A remarkably preserved Siberian woolly mammoth, dating back 52,000 years, has yielded an astonishing discovery: fossilized ...

Get ready for a biology lesson. Certain plants have extra sets of chromosomes. And it turns out, it's a useful trait for a ...