Females have one active X chromosome and one dormant X chromosome in each cell. But a study suggests that genes on the ...

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.

Greek philosopher Empedocles thought that different temperatures produced different sexes—while others were decidedly ...

Researchers have shed new light on how a type of heart valve disease -- aortic valve stenosis -- progresses differently in males and females.

Human biology is not black and white. Although newborns are typically categorized as male or female at birth based on visible ...

Researchers found that a gene on the Y chromosome influences how aortic valve stenosis progresses differently in males and ...

Females, on average, live nearly five years longer than males. They also tend to experience age-related cognitive decline at ...

Scientists discover that women's second X chromosome awakens later in life, expressing genes that protect the brain from ...

Females have one active X chromosome and one dormant X chromosome in each cell. But a study suggests that genes on the dormant X get "reawakened" later in life, potentially giving the brain a boost.