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Related Concept Videos

Gastrulation01:56

Gastrulation

Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...
Zygotic Development And Stem Cell Formation01:10

Zygotic Development And Stem Cell Formation

The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Cleavage and Blastulation01:33

Cleavage and Blastulation

After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller.

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Related Experiment Video

Updated: Jun 24, 2026

Isotropic Light-Sheet Microscopy and Automated Cell Lineage Analyses to Catalogue Caenorhabditis elegans Embryogenesis with Subcellular Resolution
08:16

Isotropic Light-Sheet Microscopy and Automated Cell Lineage Analyses to Catalogue Caenorhabditis elegans Embryogenesis with Subcellular Resolution

Published on: June 6, 2019

Nematode postembryonic cell lineages.

H R Horvitz, P W Sternberg

    Journal of Nematology
    |March 20, 2009
    PubMed
    Summary
    This summary is machine-generated.

    The study reveals that cell lineage patterns in nematodes like Caenorhabditis elegans are fixed and invariant, determining cell fates and contributing to morphological differences. These lineage differences can indicate evolutionary distance and aid in taxonomy.

    Keywords:
    Caenorhabditis elegansPanagrellus redivivusanatomydevelopmentevolutiontaxonomy

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    Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos

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    Last Updated: Jun 24, 2026

    Isotropic Light-Sheet Microscopy and Automated Cell Lineage Analyses to Catalogue Caenorhabditis elegans Embryogenesis with Subcellular Resolution
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    Published on: June 6, 2019

    Blastomere Explants to Test for Cell Fate Commitment During Embryonic Development
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    Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos
    11:25

    Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos

    Published on: February 22, 2016

    Area of Science:

    • Developmental Biology
    • Evolutionary Biology
    • Nematology

    Background:

    • Postembryonic cell lineages in free-living nematodes like Caenorhabditis elegans and Panagrellus redivivus are well-documented.
    • Cell divisions during postembryonic development significantly increase cell numbers and types across various systems.

    Purpose of the Study:

    • To analyze the invariant patterns of postembryonic cell divisions and their role in specifying cell fates.
    • To investigate how differences in cell lineage contribute to morphological variations between sexes and species.
    • To explore the utility of cell lineage data in understanding evolutionary relationships and taxonomy.

    Main Methods:

    • Detailed observation and documentation of postembryonic cell divisions in C. elegans and P. redivivus.
    • Comparative analysis of cell lineage patterns between species and sexes.
    • Genetic studies to infer the mutational basis of lineage differences.

    Main Results:

    • Postembryonic cell division patterns are highly invariant, producing a fixed number of cells with predetermined fates.
    • Cell fates are determined by a combination of lineage history and cell-cell interactions.
    • Simple genetic mutations can account for significant differences in cell lineage and resulting morphology.
    • Interspecific lineage differences correlate with evolutionary distance and taxonomic relationships.

    Conclusions:

    • Cell lineage is a fundamental determinant of nematode development and morphology.
    • Comparative cell lineage studies offer insights into evolutionary processes and taxonomic classification.
    • The methodologies and findings from C. elegans and P. redivivus research have broader implications for hematology.