What is the XXY theory?
What is the XXY theory?
XYY syndrome is a genetic condition that occurs when a male has an extra copy of the Y chromosome in each of their cells (XYY). Sometimes, this mutation is only present in some cells. Males with XYY syndrome have 47 chromosomes because of the extra Y chromosome.
What are the two types of disorders of humans where the karyotype is 47?
XYY syndrome is a rare chromosomal disorder caused by the presence of an extra Y chromosome. Normally, males have 46 chromosomes including one X and one Y chromosome. Males with XYY syndrome have 47 chromosomes, two of which are Y chromosomes.
What is 48 XXYY chromosome disorder?
48,XXYY syndrome is a chromosomal condition that causes infertility, developmental and behavioral disorders, and other health problems in males. 48,XXYY disrupts male sexual development.
What happens when you have 47 chromosomes?
Humans have 23 pairs of chromosomes. A trisomy is a chromosomal condition characterised by an additional chromosome. A person with a trisomy has 47 chromosomes instead of 46. Down syndrome, Edward syndrome and Patau syndrome are the most common forms of trisomy.
What are the signs and symptoms of 47 XYY syndrome?
Some boys with 47, XYY syndrome may have difficulty in certain subjects in school such as reading and writing. However, boys with this syndrome do not typically have intellectual disability. Other signs and symptoms of 47, XYY syndrome may include asthma, dental problems, and acne.
What causes XYY syndrome in boys?
The chromosomes contain genes, which determine an individual’s characteristics, such as eye color and height. Boys typically have one X chromosome and one Y chromosome, or XY, but boys with XYY syndrome have an extra Y chromosome, or XYY. XYY syndrome is not caused by anything the parents did or did not do.
Is 47 XYY syndrome associated with testicular pathology in males?
In contrast to men with Klinefelter and XXYY syndrome, 47,XYY syndrome is not associated with testicular pathology or with reduced testosterone levels.
Does karyotype 47 XYY affect sexual orientation?
There is no indication that the sexual orientation of boys and men with 47,XYY is any different than it is in those with a 46,XY karyotype. The commonest indications for karyotyping in boys with 47,XYY are developmental delay and/or behavioral difficulties.
