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Trisomy
(redirected from trisomy 13)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
trisomy [′trī‚sō·mē]
(cell and molecular biology)
The presence in triplicate of one of the chromosomes of the complement.

Trisomy 

the presence of one or a few nonhomologous extra chromosomes in the chromosome set of a diploid organism. Organisms (or cells) in which one, two, or more chromosomes present themselves as three homologues are called simple trisomics, double trisomics, and so forth. Trisomy is caused by the failure of chromosomes to separate (nondisjunction) during cell division. Some specific severe disorders are the result of trisomy occurring in specific chromosomes.



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It was devastating when we were told she had Trisomy 13 and was unlikely to survive.
Absence of the mastoid antrum previously has been reported in congenital syndromes such as trisomy 13 and mandibulofacial dysostosis (Treacher Collins syndrome).
The majority of infants with trisomy 18 die by 1 year of age, while the majority of infants with trisomy 13 die by 3 months of age.
 
 
 
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