Search results
Results From The WOW.Com Content Network
There are 47 chromosomes, instead of the usual 46, giving a 47,XYY karyotype. [1] Treatment may include speech therapy or extra help with schoolwork, however outcomes are generally positive. [2] The condition occurs in about 1 in 1,000 male births. [1] Many people with the condition are unaware that they have it. [4]
Klinefelter syndrome (KS), also known as 47,XXY, is a chromosome anomaly where a male has an extra X chromosome. [10] These complications commonly include infertility and small, poorly functioning testicles (if present).
48,XXYY syndrome is a condition related to the X and Y chromosomes (the sex chromosomes). People normally have 46 chromosomes in each cell. Two of the 46 chromosomes, known as X and Y, are called sex chromosomes because they help determine whether a person will develop male or female sex characteristics. Females typically have two X chromosomes ...
The presentation of XYYY syndrome is variable and at this time not entirely clear. As all known cases were diagnosed postnatally (after birth), and the similar XYY syndrome is known to have a milder phenotype in prenatally than postnatally diagnosed cases, it is suspected that many cases of XYYY syndrome may be mild or asymptomatic.
When combined with a normal cell from the other parent, the baby has 47 chromosomes, with three copies of chromosome 21. [3] [92] About 88% of cases of trisomy 21 result from nonseparation of the chromosomes in the mother, 8% from nonseparation in the father, and 3% after the egg and sperm have merged. [100]
XX male syndrome, also known as de la Chapelle syndrome, is a rare intersex condition in which an individual with a 46,XX karyotype develops a male phenotype. [2] Synonyms for XX male syndrome include 46,XX testicular difference of sex development (or 46,XX DSD) [3] [4] [5] [6]
Trisomy X, also known as triple X syndrome and characterized by the karyotype [note 1] 47,XXX, is a chromosome disorder in which a female has an extra copy of the X chromosome. It is relatively common and occurs in 1 in 1,000 females, but is rarely diagnosed; fewer than 10% of those with the condition know they have it.
These assumptions were later disproven by longitudinal studies of people diagnosed at birth with sex chromosome trisomies, which found people with 47,XXY, 47,XXX, and 47,XYY karyotypes blended into the general population and had little unusual propensity for criminality. Despite these advances regarding sex chromosome trisomies, the tetrasomy ...