Klinefelter syndrome (sometimes called Klinefelter’s, KS or XXY) is
where boys and men are born with an extra X chromosome
. Chromosomes are packages of genes found in every cell in the body. There are 2 types of chromosome, called the sex chromosomes, that determine the genetic sex of a baby.
What does an XXY person look like?
This can lead to a taller, less muscular body, less facial and body hair, and broader hips than other boys. As teens, XXY males may have larger breasts, weaker bones, and a lower energy level than other boys. By adulthood, XXY males look
similar to males without the
condition, although they are often taller.
What gender is someone with XXY?
A person’s biological sex is determined by the sex chromosomes: females have two X chromosomes, or XX; most males have one X chromosome and one Y chromosome, or XY.
Males
with XXY syndrome are born with cells that have an extra X chromosome, or XXY.
What is an Xyy person?
Boys who have XYY syndrome are born with it. It’s called XYY because
they have an extra Y chromosome in most or all of their cells
. Usually, a person has 46 chromosomes in each cell, divided into 23 pairs, which includes two sex chromosomes.
CAN XXY have babies?
It is possible that an XXY male could get a woman pregnant naturally
. Although sperm are found in more than 50% of men with KS
3
, low sperm production could make conception very difficult.
Are XXY males infertile?
Between 95% and 99% of XXY men are infertile
because they do not produce enough sperm to fertilize an egg naturally. But, sperm are found in more than 50% of men with KS.
Is there a YY gender?
Males with
XYY syndrome have 47 chromosomes because of the extra Y chromosome. This condition is also sometimes called Jacob’s syndrome, XYY karyotype, or YY syndrome. According to the National Institutes of Health, XYY syndrome occurs in 1 out of every 1,000 boys.
Is Klinefelter syndrome a disability?
If you or your dependent(s) are diagnosed with Klinefelter Syndrome and experience any of these symptoms, you may be eligible for
disability
benefits from the U.S. Social Security Administration.
Who is most likely to get Klinefelter syndrome?
Klinefelter syndrome results when
a boy is born
with at least 1 extra X chromosome. This is written as XXY. Klinefelter syndrome occurs in about 1 out of 500 to 1,000 baby boys. Women who get pregnant after age 35 are slightly more likely to have a boy with this syndrome than younger women.
How does Klinefelter syndrome affect a person’s life?
But the condition
can bring challenges later in life
. For example, guys with Klinefelter syndrome may be more likely to get some types of cancer and other diseases, like type 2 diabetes and osteoporosis, a condition where the bones become weaker later in life.
Can an XY female get pregnant?
Males and
most XY females cannot become pregnant because they don
‘t have a uterus. The uterus is where the fetus develops, and pregnancy isn’t possible without it. In most cases, having a Y chromosome means having no uterus, so pregnancy isn’t possible.
Can females have Jacob’s syndrome?
Being male is the biggest risk factor. Most cases of XYY syndrome are not inherited, and
the syndrome occurs randomly in pregnancies of women from all ages and ethnic backgrounds
.
Do serial killers have an extra chromosome?
According to Dr Helen Morrison, an American forensic psychologist and writer, chromosome abnormality in serial killers begins to express itself during puberty. Serial killer, Bobby Joe
Long has an extra X chromosome
, causing him to produce excess amount of oestrogen.
What happens if a baby is XXY?
Children with XXY syndrome may require academic, social, and emotional support.
Adolescents may enter puberty at the normal time
, but then have decreased facial and body hair, decreased muscle development, smaller testicles, and swelling of the breasts (gynecomastia). Depression and anxiety may occur at this age.
Can Klinefelter syndrome produce sperm?
Most men with
Klinefelter syndrome produce little or no sperm
, but assisted reproductive procedures may make it possible for some men with Klinefelter syndrome to father children.
What is the difference between XXY and XYY?
Despite having fewer learning and language problems than the
47,XXY
group, males with 47,XYY have been reported to be more disruptive and impulsive, which greatly interferes with their learning skills. Males with 47,XXY are typically shy and withdrawn compared to 47,XYY.
