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Related Concept Videos

Binary Fission01:20

Binary Fission

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Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
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Binary Fission01:26

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Binary fission is the primary mode of asexual reproduction in prokaryotes, such as bacteria. It results in the production of two genetically identical daughter cells. This highly efficient process ensures the rapid propagation of bacterial populations under favorable conditions and involves coordinated cellular and molecular events.DNA Replication and SeparationThe process begins with the replication of the bacterial chromosome. The circular DNA molecule unwinds at a specific origin of...
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DNA replication has three main steps: initiation, elongation, and termination. Replication in prokaryotes begins when initiator proteins bind to the single origin of replication (ori) on the cell's circular chromosome. Replication then proceeds around the entire circle of the chromosome in each direction from the two replication forks, resulting in two DNA molecules.
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Updated: Mar 20, 2026

G2-seq: A High Throughput Sequencing-based Technique for Identifying Late Replicating Regions of the Genome
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Replicating Large Genomes: Divide and Conquer.

Juan Carlos Rivera-Mulia1, David M Gilbert2

  • 1Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA.

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|June 4, 2016
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Summary
This summary is machine-generated.

Large genomes use multi-replicon domains to regulate DNA replication initiation. This domain structure ensures genome stability by adjusting replication forks during stress and provides a scaffold for chromosome evolution.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • DNA replication requires precise control of initiation sites, yet thousands are available.
  • Replication machinery assembly is cell-cycle regulated, but initiation site selection is flexible.
  • Large genomes necessitate dynamic regulation of replication forks to maintain stability.

Purpose of the Study:

  • To investigate the role of multi-replicon domains in regulating DNA replication.
  • To understand how genome domains contribute to preventing instability during replication stress.
  • To explore the evolutionary implications of domain structure on chromosome function.

Main Methods:

  • The study proposes a theoretical framework based on existing knowledge of DNA replication and genome organization.
  • Analysis of large-scale chromosomal structures and replication timing data.
  • Comparative genomics to infer evolutionary pressures on domain formation.

Main Results:

  • Large genomes are organized into multi-replicon domains that dictate replication initiation timing.
  • Domain structure provides flexibility in initiation site selection while ensuring efficient replication.
  • Dynamic adjustment of replication forks within domains is crucial for responding to replication stress.

Conclusions:

  • Multi-replicon domains are essential for managing DNA replication in large genomes.
  • Domain organization resolves the conflict between numerous potential origins and the need for regulated initiation.
  • This chromosomal organization facilitates genome stability and provides a framework for evolutionary innovation.