What is a person with XXY chromosomes?
Klinefelter syndrome is a genetic condition in which a boy is born with an extra X chromosome. Instead of the typical XY chromosomes in men, they have XXY, so this condition is sometimes called XXY syndrome. Men with Klinefelter usually don’t know they have it until they run into problems trying to have a child.
What chromosomes do females have?
Each person normally has one pair of sex chromosomes in each cell. Females have two X chromosomes, while males have one X and one Y chromosome. Early in embryonic development in females, one of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells.
Can someone have XXY chromosomes?
Males with XXY syndrome are born with cells that have an extra X chromosome, or XXY. This can cause delayed development and puberty, a smaller penis and testicles, infertility, and other symptoms. The condition that causes XXY syndrome is present at birth and can’t be changed.
What happens if someone is born with XXY chromosome?
Klinefelter syndrome may adversely affect testicular growth, resulting in smaller than normal testicles, which can lead to lower production of testosterone. The syndrome may also cause reduced muscle mass, reduced body and facial hair, and enlarged breast tissue.
What is XXY chromosome?
XXY chromosomes are a naturally occurring human male variation. XXY men are identical in physical appearance and mental capacity to XY men. • XXY = male.
How many X and Y chromosomes are there in a male?
The X and Y chromosomes are the sex chromosomes. Females usually have two X chromosomes (46, XX) and males usually have one X and one Y chromosome (46, XY). People with 47, XXY have two X chromosomes and one Y chromosome.
What is it called when a male has two X chromosomes?
Usually, females have two X chromosomes (XX). Males have an X and a Y (XY). But in rare cases, a male is born with an extra X chromosome (XXY). This is Klinefelter syndrome. It’s also called Klinefelter’s or XXY.
What is the difference between 47 and XXY?
People with 47, XXY have an extra chromosome. The X and Y chromosomes are the sex chromosomes. Females usually have two X chromosomes (46, XX) and males usually have one X and one Y chromosome (46, XY).