The octopus just revealed another one of its secrets: what determines its sex. University of Oregon researchers have ...

In humans and many other animal species ... Henking noticed that some wasp sperm cells had 12 chromosomes, while others had only 11 chromosomes. Also, during his observation of the stages of ...

Because the centrosomes are located outside the nucleus in animal cells, the microtubules of the developing spindle do not have access to the chromosomes until the nuclear membrane breaks apart.

Cephalopods may have the oldest sex chromosomes of any animal, according to a new discovery in the octopus genome. That's a ...

"All but one of this lungfish's 19 chromosomes is ... the letters found in human cells. And this particular lungfish may not be the record holder for the largest animal genome for long.

"What we showed is that these animals' brains were really aging faster than the brains of their genetically identical sisters who had both mom's and dad's X chromosomes turned on," explained Dubal.

Why are the human sex chromosomes called “X” and “Y,” while the other 22 chromosomes are identified only by numbers? The answer begins in the late 1800s, when insect gonad cells, whose large ...

Compartment in cell where DNA is stored as chromosomes Controls activities of cell Animal cell, plant cell or fungal cell Cell structure Cell wall Description Freely permeable layer surrounding ...

A human cell contains 46 chromosomes. To simplify our illustration, we'll show only four. Though the genetic code of a human being is contained within 46 chromosomes, only half of this number ...

The X chromosome passed from mom to offspring may accelerate brain aging, a new animal study suggests ... females carry two X chromosomes in each cell — one from their mom and one from their ...

Researchers from the University of California, San Francisco (UCSF) say they have now found that when the brain cells of female mice express only a maternal X chromosome, the animals’ memory and ...