Supernumerary nipples and renal malformations: a family study

Justin Brown1, Robert A Schwartz

  • 1Dermatology, New Jersey Medical School, 07103-2714, Newark, New Jersey, USA.

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Nondisjunction

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers.  Nondisjunction is common during anaphase I or anaphase II of meiosis.  Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold sister...
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