Sexual development usually proceeds normally and puberty is usually unaffected by the extra Y chromosomes. In some boys with XYYY chromosomes, however, incomplete sexual development becomes noticeable at puberty when signs of sexual maturation fail to develop fully.
The median age of survival was 77.9 years for controls and 67.5 years for 47,XYY persons, corresponding to a loss of median lifespan of 10.3 years.
The high frequency of XYY men among criminals has been claimed to be the outcome of a number of factors; three of these, in particular, aggressiveness, tallness, and low intelligence, have been the subjects of extensive studies.
DATA FROM STUDIES ALL OVER THE WORLD, WHILE GENERALLY AFFIRMING THE AGGRESSIVE TENDENCIES OF XYY MALES, HOLD VARIOUSLY ON THE INCIDENCE OF XYY'S AMONG THE POPULATIONS OF OFFENDERS INCARCERATED BOTH IN PRISONS AND MENTAL INSTITUTIONS.
Most individuals with 47,XYY syndrome have normal production of the male sex hormone testosterone and normal male sexual development, and they are usually able to father children.
A few 47,XXY cases with a female phenotype have been reported. These individuals have positive SRY (testis-determining factor). The genetic explanation of this phenomenon is unclear.
Tom Cruise
Tom Cruise is one of the most influential and famous people with Klinefelter syndrome. He is a renowned American actor who has won many accolades for his work.
The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes. Identifying genes on each chromosome is an active area of genetic research.
The sex of human and other mammal babies is decided by a male-determining gene on the Y chromosome. But the human Y chromosome is degenerating and may disappear in a few million years, leading to our extinction unless we evolve a new sex gene.
Superman syndrome, also known as 47, XYY, is a condition classified as a chromosomal aneuploidy (which is an abnormality in chromosome structure and/or number) in which males have an additional Y chromosome.
Hypertrichosis of the ears, webbed toes, and porcupine man are examples of Y-linked inheritance in humans. Hypertrichosis of the ears (or hairy ears) is a condition wherein there is a conspicuous growth of hair on the outside rim of the ear.
Y-linked genetic diseases only affect males.
Because females have two X chromosomes and no Y chromosome, they cannot inherit Y-linked genetic disorders.
Life expectancy for people with mosaic trisomy 8 is normal unless other health conditions such as cancer arise.
Loss of part or all of an X chromosome causes Turner syndrome in females, whereas gains of one or more X chromosomes result in Klinefelter syndrome in males (Simpson et al.
During early development the gonads of the fetus remain undifferentiated; that is, all fetal genitalia are the same and are phenotypically female. After approximately 6 to 7 weeks of gestation, however, the expression of a gene on the Y chromosome induces changes that result in the development of the testes.
Klinefelter syndrome is a chromosomal condition that strictly affects males.
Jacobs syndrome is a rare genetic abnormality in which a male receives an extra Y chromosome from his father.
A rare genetic condition in which people who have an X chromosome and a Y chromosome (the usual pattern for males) look female. They have normal female reproductive organs, including a uterus, fallopian tubes, and vagina.
It is possible that an XXY male could get a woman pregnant naturally. Although sperm are found in more than 50% of men with KS3, low sperm production could make conception very difficult.
An extra copy of the X chromosome is associated with tall stature, learning problems, and other features in some affected individuals. Some females with trisomy X have an extra X chromosome in only some of their cells. This phenomenon is called 46,XX/47,XXX mosaicism.
There are 2 types of chromosome, called the sex chromosomes, that determine the genetic sex of a baby. These are named either X or Y. Usually, a female baby has 2 X chromosomes (XX) and a male has 1 X and 1 Y (XY). But in Klinefelter syndrome, a boy is born with an extra copy of the X chromosome (XXY).
XYY syndrome is a rare chromosomal disorder that affects males. It is caused by the presence of an extra Y chromosome. Males normally have one X and one Y chromosome. However, individuals with this syndrome have one X and two Y chromosomes. Affected individuals are usually very tall.