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Meiosis I

Meiosis I

Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...

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Related Experiment Video

Updated: Jul 3, 2025

Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II

Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II

Published on: February 26, 2018

"MeiQuant": An Integrated Tool for Analyzing Meiotic Prophase I Spread Images.

Julien Cau¹, Laurine Dal Toe², Akbar Zainu³

¹Biocampus Montpellier, University of Montpellier, CNRS, INSERM, Montpellier, France. julien.cau@biocampus.cnrs.fr.

Methods in Molecular Biology (Clifton, N.J.)

|February 14, 2024

Summary

This summary is machine-generated.

MeiQuant is a new ImageJ macro tool for analyzing fluorescent objects in mouse meiosis images. This tool aids in studying chromosome organization and homologous recombination during prophase I.

Keywords:

Chromosome structure Foci count Homologous recombination Image analysis ImageJ Intensity measurement MeiQuant Meiosis Protein localization

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Last Updated: Jul 3, 2025

Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II

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Published on: February 26, 2018

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Published on: October 11, 2022

Live Cell Imaging of Chromosome Segregation During Mitosis

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Published on: March 14, 2018

Area of Science:

Cell Biology
Genetics
Microscopy

Background:

Immunocytochemical analysis of meiotic proteins on mouse chromosome spreads is crucial for studying prophase I chromosome organization and homologous recombination.
Advances in microscopy have generated extensive image data of fluorescent proteins, posing challenges for in-depth analysis.

Purpose of the Study:

To develop a unified, evolutive image analysis tool for meiosis research.
To specifically address the analysis of fluorescent objects in mouse prophase I meiotic events.

Main Methods:

Development of a set of tools using the ImageJ macro language.
Implementation of these tools within the "MeiQuant" macro.
Focus on analyzing fluorescent object properties like length, intensity, and distance, as well as foci identification, counting, and colocalization.

Main Results:

A novel macro, "MeiQuant," has been created for ImageJ.
The macro provides specialized tools for analyzing fluorescent objects in meiotic images.
It facilitates detailed measurements and identification of key events in mouse prophase I.

Conclusions:

MeiQuant offers a unified and adaptable solution for analyzing meiotic images.
This tool addresses the challenge of deep analysis of fluorescent objects in microscopy data.
It specifically supports research on mouse prophase I meiotic events and homologous recombination.