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Trisomy 16
Trisomy 16 is a chromosomal abnormality in which there are 3 copies of chromosome 16 rather than two. It is the most common trisomy leading to miscarriage and the second most common chromosomal cause of it, closely following X-chromosome monosomy. Like most chromosomal abnormalities, trisomy 16 usually causes miscarriage in the first trimester of pregnancy. It is not possible for a child to be born alive with an extra copy of this chromosome present in all cells (full trisomy 16). It is possible, however, for a child to be born alive with the mosaic form. ==Chromosome 16==
Normally humans have 2 copies of chromosome 16, one inherited by each parent. This chromosome represents almost 3% of all DNA in cells.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Trisomy 16」の詳細全文を読む
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