Modern geneticists no longer use these familiar symbols and instead rely on a square (for male) and circle (for female): This symbolism was developed by Pliny Earle, a doctor with the Bloomingdale ...

The researchers discovered that female and male cells behave differently after the reprogramming process due to their different number of X chromosomes—two in female cells and one in male cells.

By virtue of having a second X chromosome, women get two "doses" of a protective protein from a gene that only exists on this female sex chromosome. Some people, both male and female, have an ...

The male and female nuclei go on to form the two separate halves of the same bird. In this scenario, the bird can be either sex on either side, depending on how the female's chromosomes are split ...

Included in this group are the two sex chromosomes: simply dubbed X and Y. Cells in women's bodies have two X chromosomes (XX), while cells in men's bodies have one X and one Y (XY). Thus, we get our ...

For the first time scientists have created two lines of human cells that are identical aside from their sex chromosomes: one has XX chromosomes, and one has XY. This unique set of cells could help ...

In humans, biological sex is usually determined by our chromosomes. Those born female typically have two X chromosomes, while those born male tend to have an X and a Y chromosome. Birds are the ...

"Nobody is male or female at fertilization," says Dr. Eve Feinberg in response to Trump's executive order that claims a person's sex is decided "at conception." ...

Calico Cats usually have beautiful and unique tri-color patterns. They are almost exclusively female cats, with exceptions under rare genetic conditions, as they generally have two X chromosomes.

An Algerian boxer with male chromosomes defeated an Italian woman boxer in an Olympics boxing match on Thursday after landing a devastating punch to the woman’s face in the brief 46-second fight.

Some people, both male and female, have an especially potent variant of this gene, which is called KDM6A, that gives them even more protection. But, because of the way sex chromosomes work – women ...