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Related Experiment Videos

Chromosome interlocking during synapsis--a transient disorder.

S W Rasmussen1

  • 1Department of Physiology, Carlsberg Laboratory, Copenhagen, Denmark.

The Tokai Journal of Experimental and Clinical Medicine
|December 1, 1986
PubMed
Summary
This summary is machine-generated.

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Chromosome interlocking occurs and resolves during zygotene in Bombyx spermatocytes. Most interlockings resolve by the pachytene stage, with up to 61% of chromosomes affected in zygotene nuclei.

Area of Science:

  • Cytogenetics
  • Molecular Biology

Background:

  • Chromosome interlocking is a phenomenon observed during meiosis.
  • Understanding its dynamics is crucial for comprehending chromosome behavior and segregation.

Purpose of the Study:

  • To monitor the occurrence and resolution of chromosome interlocking during meiosis in Bombyx spermatocytes.
  • To quantify the frequency of interlockings at zygotene and pachytene stages.

Main Methods:

  • Analysis of spread and silver-stained chromosome complements from 270 zygotene and 125 pachytene Bombyx spermatocytes.
  • Microscopic observation and quantification of chromosome interlockings.

Main Results:

  • Chromosome interlockings form and resolve throughout the zygotene stage.

Related Experiment Videos

  • The mean number of interlockings per nucleus is 4.2 at zygotene.
  • A significant decrease in interlockings is observed by the pachytene stage, with only 3 presumptive interlockings found.
  • Up to 61% of chromosomes can be affected by interlocking in individual zygotene nuclei.

    • Conclusions:

    • Chromosome interlocking is a dynamic process during zygotene.
    • The majority of interlockings are resolved before the pachytene stage.
    • Further investigation into the resolution mechanism is warranted.