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Microscopic Replantation of Penile Glans Amputation Due to Circumcision
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Microscopic Replantation of Penile Glans Amputation Due to Circumcision

Published on: June 3, 2022

Penile duplication in newborn with multiple anomalies

Mediha Kardasevic1, Fatima Begic, Mujo Sivic

  • 1Cantonal Hospital Bihac, Bosnia and Herzegovina. medihakardasevic@hotmail.com

Medical Archives (Sarajevo, Bosnia and Herzegovina)
|July 25, 2012
PubMed

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Nondisjunction01:29

Nondisjunction

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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...
Nondisjunction01:29

Nondisjunction

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Gene Duplication and Divergence

The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
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Meiosis I

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