Sex chromosomes are the genetic elements that define a person's biological sex. Learn about the XX and XY chromosomes, the sex determination system, and other chromosome combinations.

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

Each human cell contains 23 pairs of chromosomes that carry DNA within their nucleus. The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair. They determine the ...

Typically, human females have two X chromosomes while males possess an XY pairing. This XY sex-determination system is found in most mammals as well as some reptiles and plants.

They were born with an XY chromosome, which is the male chromosome, but they were born with female bodies. They have the physical attributes of a female," she said.

Let’s say a male peacock had XY sex chromosomes, and had the genes for his beautiful tail embedded on his X chromosome. Even if he got to mate, his fabulous tail would only go to his daughters.

In most cases. if an individual is revealed to have XY chromosomes, they would fall under the male gender. However, there are exceptions, as there are certain conditions that can allow a woman to ...

Letters to the editor submitted to the Naperville Sun. Chromosomes should dictate who competes against who. People with an XY chromosome combination have more physical strength (especially upper ...

Each human cell contains 23 pairs of chromosomes that carry DNA within their nucleus. The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair. They determine the ...