Interkinesis

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Interkinesis as a technical term in cell biology describes a section between the 1st and 2nd meiotic division during a meiosis ( meiotic division ).

The interkinesis follows the completion of the first meiosis , the telophase I of the reduction division , in which two cell nuclei with a reduced number of chromosomes are formed, which usually corresponds to a haploid chromosome set . At this stage, each of the two daughter nuclei has a complete genome consisting of 2 chromatid chromosomes, but with a different composition. In particular, the alleles present heterozygously in the starting nucleus are now distributed differently and the daughter nuclei are not identical in this regard.

The transition from meiosis I to meiosis II is designed differently in different organisms. A stage of interkinesis of different lengths between the two sub-steps I and II of meiosis can serve as a resting stage or for the reconstruction of a nuclear envelope; nucleoli are occasionally also formed; a replication of the DNA , however, does not take place. In this respect, this intermediate stage should not be confused with the interphase in the cell cycle between successive mitotic divisions.

The interkinesis is followed by the second meiosis, meiosis II or equation division .

Individual evidence

  1. a b Wilfried Janning, Elisabeth Knust: Genetics: General Genetics - Molecular Genetics - Developmental Genetics . 2nd Edition. Georg Thieme, Stuttgart 2008, ISBN 978-3-13-151422-6 , p. 33 .