The Y chromosome has seen significant changes over the course of human evolution. "In comparison to the X, the Y is tiny. There are only 45 genes on the Y chromosome, ...

The Y chromosome can disappear over time in human males, which may introduce a number of health problems. While the exact trigger for such degeneration is unknown, environmental factors can play a ...

Surprisingly, in several different cell types of the hippocampus, the X chromosome that was supposed to be silent instead expressed about 20 genes. Many of them play a role in brain development, as ...

In many organisms, X and Y chromosomes can jettison extra material during DNA-swapping sessions with each other. But the campion lost much of its ability to tidy up large parts of its sex ...