作者: Zuzana Storchova
DOI: 10.1002/9780470015902.A0001451.PUB2
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摘要: Numerical aberrations (whole chromosomal aneuploidy) represent a significant proportion of changes found in humans. These can occur as consequence chromosome segregation defects during cell division. Segregation errors arising reductive division, or meiosis, are upon fertilisation and subsequent embryo development constitutively present all cells, resulting whole organismal aneuploidy. Missegregation mitosis leads to mosaic distribution Aneuploidy is associated with pathological states most organisms. cause pregnancy loss well abnormalities live births. Moreover, numerical frequently ageing tissues tumour cells. Although the association aneuploidy cancer known for almost century, dispute still ongoing whether this transformation. Recently, new evidence emerging that significantly alter physiology eukaryotic cells might indeed directly contribute tumorigenesis. Key Concepts: Numerical result from segregations. Trisomy, monosomy polyploidy among major causes spontaneous human abortions. Trisomies compatible survival often multiple defects. Numerical cells. Numerical tumorigenesis. Keywords: numerical aberrations; aneuploidy; polyploidy; trisomy; tetraploidy; cancer