Human biological sex is determined by the sex chromosomes X and Y. In most cases, females possess two X chromosomes, while males have one X and one Y. However, there is some evidence that the Y ...

When Nettie Steven discovered the Y chromosome in 1905 while studying the mealworm Tenebrio molitor, she identified it as a sex-determining chromosome. As it turns out, the chromosome also has ...

The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair. They determine the biological sex, reproductive organs, and sexual characteristics that develop in a person.

However, Oetjens and his team at Geisinger College wanted to investigate whether the Y chromosome may also play a role. To ...

If this hereditary tradition has been closely followed, the Y chromosomes of the Cohanim today should bear some resemblance to one another because of their unbroken link back to a common ancestor ...

A test on lab mice may have helped scientists in California debunk a theory that part of the make up of genetics in females ...

The wet diaper test was used to reliably test infants ... Like X-linked dominant diseases, Y chromosome-linked diseases are also extremely rare. Because only males have a Y chromosome and they ...

So far, of the approximately 31,000 genes in the human genome, men and women differ only in the two sex chromosomes, X and Y, and only a few dozen genes seem to be involved. Moreover, it's now known ...