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Researchers are gaining a new appreciation for the genes on the X and Y chromosomes and how they shape sex differences in ...

New research shows the X chromosome influences disease risk, immunity and drug response beyond its role in sex.

For years, we’ve been taught that men have one X and one Y chromosome, with the Y carrying the vital gene that initiates male development. But now, scientists are sounding the alarm: the Y chromosome ...

The Y chromosome is perhaps the most puzzling part of the human genome. Associated with male development, it is chock-full of repetitive and inverted stretches of DNA, a hurdle that makes it ...

Is the end of men near? Scientists warn the Y chromosome, key to male identity, is shrinking fast after 166 million years of ...

Earlier this year, the often overlooked issue of differences in sex development came to the fore after two women boxers were allowed to compete in the Olympics after previously failing a gender ...

A mixture of DNA and proteins—known as "chromatin"—sits inside every cell nucleus as a jumbled puddle of genetic information. As cells prepare to divide during mitosis, the chromatin is condensed into ...

Cancer cells that accumulate extra copies of their entire chromosome set can start behaving like immune cells, swallowing ...

The California two-spot octopus (Octopus bimaculoides) is native to the coast of California and Mexico and is identified by their bright blue eyespots. (Roger T. Hanlon/Marine Biological Labratory) ...