Tisomy: Difference between revisions
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A Trisomy is a type of polysomy inwhich instead of the usual two [[chromosomes|chromosomes]], there are three copies of a particular chromosome. A trisomy is a type of [[aneuploidy|aneuploidy]] (an abnormal number of chromosomes). | |||
The majority of human trisomies result in miscarriage, however there are a number of types that survive to birth. These include; Trisomy 13 (Patau Syndrome), Trisomy 18 ( | The majority of human trisomies result in miscarriage, however there are a number of types that survive to birth. These include; [[Trisomy 13|Trisomy 13]] ([[Patau_Syndrome|Patau Syndrome]]), [[Trisomy_18|Trisomy 18]] ([[Edward's_Syndrome|Edward's syndrome]]) and [[Trisomy 21|Trisomy 21]] ([[Down Syndrome|Down Syndrome]]). Autosomal trisomy shows various levels of mental retardation and is associated with physical traits. | ||
Trisomy of sex chromosomes also occurs. XXX (Triple X syndrome) and XXY (Klinefelter syndrome). | Trisomy of [[Sex_chromosomes|sex chromosomes]] also occurs. XXX ([[Triple X syndrome|Triple X syndrome]]) and XXY ([[Klinefelter_syndrome|Klinefelter syndrome]]). | ||
Revision as of 03:07, 27 November 2013
A Trisomy is a type of polysomy inwhich instead of the usual two chromosomes, there are three copies of a particular chromosome. A trisomy is a type of aneuploidy (an abnormal number of chromosomes).
The majority of human trisomies result in miscarriage, however there are a number of types that survive to birth. These include; Trisomy 13 (Patau Syndrome), Trisomy 18 (Edward's syndrome) and Trisomy 21 (Down Syndrome). Autosomal trisomy shows various levels of mental retardation and is associated with physical traits.
Trisomy of sex chromosomes also occurs. XXX (Triple X syndrome) and XXY (Klinefelter syndrome).