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FISH for Pre-implantation Genetic Diagnosis
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FISH for Pre-implantation Genetic Diagnosis

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A dysmorphic child with a pericentric inversion of chromosome 8

Venkateshwari Ananthapur1, Srilekha Avvari, Sujatha Madireddi

  • 1Institute of Genetics and Hospital for Genetic Diseases, Osmania University, Begumpet, Hyderabad 500 016, India.

Case Reports in Pediatrics
|May 19, 2012
PubMed

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Nondisjunction01:21

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During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
Nondisjunction01:29

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