We don't know exactly why men are taller than women on average, but we have some genetic clues. On average, human males tend ...

Males imprint their DNA by adding methyl modifications to it in a way that alters the activity of genes in order to promote ...

“The diploid alignment was even more dramatically divergent, showing a difference of 16.11% between humans and chimps. When sex chromosomes were analyzed, chimpanzee X chromosomes were over 20% ...

Researchers mapped Y chromosome loss across thousands of individual cells from human cancers, with disturbing results.

University of Adelaide researchers discovered monotremes use a completely different sex determination system than other mammals.

Proposed language would recognize two sexes in North Carolina’s rules and public policies, echoing President Donald Trump’s executive order.

The low iron disrupts the activation of a key gene that spurs the development of male sex organs. This causes embryos with XY chromosomes — the most common combination seen in males — to develop ...

Height is one of the most evident sex-based differences observed in humans, as men are on an average 13 cm (5 inches) taller than women. Sex hormones certainly play a significant role in driving ...

Scientists at the University of Oregon uncovered a sex chromosome in the California two-spot octopus, dating back 480 million years, making it the oldest known. This discovery adds a new dimension ...

Alternatively, octopuses could use a sex determination system that only involves the Z chromosome—males have a pair, and females just have one. That's still to be determined, Coffing said.

The sex chromosomes of insects are thought to be around 450 million years old but have gone through more change over that time. Chromosomes determine the sex in humans and most mammals, but Kern said ...

The final pair of chromosomes are the sex chromosomes, X and Y. You typically get one sex chromosome from a parent egg cell (always an X) and the other from a parent sperm cell (an X or a Y).