X chromosome

(Newser) - Why are men, on average, taller than women? A massive new genetic study reveals how a single gene may account for a slice of the difference. The SHOX gene has been thought to influence height—but since it's present on both X and Y chromosomes, researchers could only...

(Newser) - It's not just in human populations that females tend to live longer than males. The same trend has been seen in mammals such as elephants, lions, and orcas, according to a new study. Indeed, demographic data for 134 populations of 101 mammalian species shows females outlive males in 60%...