They found that during an average follow-up time of 11.5 years, men with loss of Y chromosome in more than 40 percent of their white blood cells showed a 31 percent increased risk of cardiovascular ...

(Photo Credit: E+/Getty Images) Turner syndrome happens when a female is missing certain genes normally on the X chromosome. (Females have two X chromosomes, while males have an X and a Y chromosome).

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 ...

Turner syndrome (also known as gonadal dysgenesis), which only affects people assigned female at birth, results when one of the X chromosomes is missing or ... of an extra Y chromosome.