Concept
Version 7
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Disorders in Chromosome Number
Nondisjunction in Meiosis
Nondisjunction occurs when homologous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnormal chromosome number. Nondisjunction may occur during meiosis I or meiosis II.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Chromosomal Basis of Inherited Disorders. October 16, 2013."
http://cnx.org/content/m44483/latest/Figure_13_03_02.png
OpenStax CNX
CC BY 3.0.