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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 infer-tility), XXYY is associated with additional medical problems and more significant neurodevelopmental and psychological features.
- What is XXYY Syndrome
XXYY Syndrome is the name attached to the cluster of...
- What is XXYY Syndrome
XXYY Syndrome is the name attached to the cluster of symptoms that arise as a result of the 48,XXYY chromosome pattern. It affects one in every 17,000 boys.
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).
48,XXYY is a rare condition typically due to a sporadic aneuploidy event with an estimated recurrence risk of <1% (may be higher for cases of advanced maternal age). Genetic counseling for this condition should include a review of the possible and highly variable physical, medical, developmental and psychological features of 48,XXYY.
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.
XXYY syndrome is a sex chromosome anomaly in which males have an extra X and Y chromosome. Human cells usually contain two sex chromosomes, one from the mother and one from the father. Usually, females have two X chromosomes and males have one X and one Y chromosome.
24 sie 2008 · XXYY syndrome is a sex chromosome anomaly that is thought to occur in about one in 18,000 males in the general population. Boys with XXYY syndrome usually come to the attention of...
