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Related Concept Videos

Meiosis I03:09

Meiosis I

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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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Oogenesis02:07

Oogenesis

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In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
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Somatic to iPS Cell Reprogramming01:29

Somatic to iPS Cell Reprogramming

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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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Meiosis vs. Mitosis02:57

Meiosis vs. Mitosis

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Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
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Nondisjunction01:21

Nondisjunction

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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...
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Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Related Experiment Video

Updated: May 30, 2025

Isolation and Derivation of Mouse Embryonic Germinal Cells
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Isolation and Derivation of Mouse Embryonic Germinal Cells

Published on: October 22, 2009

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Revisiting the female germline cell development.

Youmei Huang1, Yunlong Zhang1, Jiahong Yang1

  • 1College of Life Sciences, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China.

Frontiers in Plant Science
|January 29, 2025
PubMed
Summary

Female germline development in Arabidopsis involves specific cell fate determination regulated by gene networks and hormones. Understanding megaspore mother cell (MMC) development is key to plant reproduction.

Keywords:
MMCcell-cycle regulatorsepigenetic pathwaysphytohormonesplant reproduction processes

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Extended Live Imaging of Female Drosophila melanogaster Germline Stem Cell Niches

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Area of Science:

  • Plant reproductive biology
  • Developmental genetics
  • Cell biology

Background:

  • Sexual reproduction in flowering plants hinges on female germline formation.
  • In Arabidopsis, a single somatic cell differentiates into the megaspore mother cell (MMC), the initial female germline.
  • Understanding MMC development is crucial for deciphering plant reproductive mechanisms.

Purpose of the Study:

  • To review recent advancements in understanding female germline development in plants.
  • To explore the roles of gene regulatory networks, epigenetics, cell cycle, and hormones in this process.
  • To discuss key phases and potential regulatory pathways in female germline development.

Main Methods:

  • Whole-mount single-molecule fluorescence in situ hybridization (smFISH)
  • Laser-assisted microdissection (LCM)
  • Chromatin immunoprecipitation/sequencing
  • CRISPR gene editing
  • Single-cell and spatial transcriptomics

Main Results:

  • Advanced technologies offer new insights into female germline development stages.
  • Gene regulatory networks, epigenetic modifications, cell-cycle control, and phytohormones are critical regulators.
  • Distinct phases and potential restrictive pathways governing germline development are identified.

Conclusions:

  • Recent technological breakthroughs have significantly advanced the study of female germline development.
  • A complex interplay of genetic, epigenetic, and hormonal factors governs MMC development.
  • Further research into distinct pathways may reveal novel mechanisms controlling germline fate.