Asked by: Harbhajan XXVIasked in category: General Last Updated: 17th February, 2020
How does Xyy happen?
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Considering this, how does a person get XYY syndrome?
Most people have 46 chromosomes in each cell. 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.
Furthermore, are XYY males infertile? Many men with 47,XYY karyotype are fertile in spite of their sex chromosome abnormalities. Some researchers have suggested that the extra Y chromosome is lost before meiosis,3,6–8 thus conserving fertility in these patients.
Hereof, how common is XYY syndrome?
XYY syndrome is a rare chromosomal disorder present at birth that affects only males. It is estimated to occur in approximately one in 1,000 live births.
Can humans have 2 Y chromosomes?
XYY syndrome is a rare chromosomal birth defect that occurs when a male infant is born with an extra Y chromosome. Instead of having one X and one Y sex chromosome, those with XYY syndrome have one X and two Y chromosomes. XYY syndrome (also called Jacob's syndrome, XYY karyotype, or YY syndrome) affects only males.