Klinefelter syndrome, also known as XXY syndrome, is the result of an extra X chromosome in people assigned male at birth. It is associated with high rates of sterility and sexual dysfunction.

Created with Sketch. Also known as XXY syndrome, this rare condition occurs when male babies are born with an extra X chromosome. These individuals tend to have smaller genitalia, extreme shyness ...

Klinefelter syndrome is a trisomy of the sex chromosomes. Most commonly (around 82 percent of the time) there is an extra X ...

“We have thought that the X chromosome had something to do with the autoimmune ... or an offshoot called CREST syndrome.” Autoantibody markers that help narrow the diagnosis could better equip doctors ...

STUDIES of human chromosomes ... present on the X chromosome. There would remain only XXY cells, and the situation would be indistinguishable from Klinefelter's syndrome arising by the more ...

A century after Down syndrome ... a segment of chromosome 21 is transferred to a second chromosome, usually chromosome 14 or 15. When the translocation chromosome with the extra piece of ...

Dec. 1, 2022 — Research on understanding the effect of extra chromosomes for conditions like Down syndrome typically involves examining what genes play a role in the symptoms of these conditions.

Females (XX) carry twice as many X-linked genes on their sex chromosomes as males (XY). How do cells control gene expression to manage this potentially lethal dosage problem? A prime example of X ...

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.