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Unraveling XXYY Syndrome: Understanding the Rare Chromosomal Disorder • Unraveling XXYY Syndrome • Learn about XXYY syndrome, a rare chromosomal disorder in ...
Unveiling XXYY Syndrome: Understanding the Extra Chromosome • XXYY Syndrome Breakdown • Explore the rare genetic disorder XXYY Syndrome, where individuals ha...
Unraveling XXYY Syndrome: Understanding a Rare Chromosomal Disorder • XXYY Syndrome Explained • Discover the rare chromosomal disorder XXYY syndrome in human...
XXYY syndrome is a sex chromosome anomaly in which males have two extra chromosomes, one X and one Y chromosome. Human cells usually contain two sex chromosomes, one from the mother and one from the father. Usually, females have two X chromosomes (XX) and males have one X and one Y chromosome (XY).
14 maj 2008 · We report on the results of a cross-sectional, multi-center study of 95 males age 1–55 with XXYY syndrome (mean age 14.9 years), describing diagnosis, physical features, medical problems, medications, and psychological features stratified by age groups.
“XXYY syndrome occurs in approximately 1:18,000–1:40,000 males. Although the physical phenotype is similar to 47,XXY (tall stature, hypergonadotropic hypogonadism, and infertility), XXYY is associated with additional medical problems and more significant neurodevelopmental and psychological features.”
XXYY syndrome is the result of having extra copies of both the X and Y chromosomes, occurring when a normal female oozyte (X m) is fertilized with an aneuploidy sperm (X p Y p Y p) produced from double nondisjunction during meiosis.
