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Related Concept Videos

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.
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...
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...
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...
Cellular Differentiation00:57

Cellular Differentiation

How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...
Development of the Sexual Organs in the Embryo and Fetus01:15

Development of the Sexual Organs in the Embryo and Fetus

Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...

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Blastomere Explants to Test for Cell Fate Commitment During Embryonic Development
14:08

Blastomere Explants to Test for Cell Fate Commitment During Embryonic Development

Published on: January 26, 2013

Embryonic determination and differentiation

V M Ingram, R W Keane

    Annals of Internal Medicine
    |April 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Understanding cellular development requires studying determination and differentiation. This research explores molecular mechanisms using virus-transformed chick cells as a novel model system.

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    Analysis of Cell Differentiation, Morphogenesis, and Patterning During Chicken Embryogenesis Using the Soaked-Bead Assay
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    Published on: January 12, 2022

    Area of Science:

    • Developmental biology
    • Cellular and molecular biology

    Background:

    • Cellular development involves determination and differentiation.
    • Understanding the molecular mechanisms of these processes is challenging.
    • Model systems are crucial for studying complex biological processes.

    Purpose of the Study:

    • To discuss challenges in understanding molecular mechanisms of cell determination and differentiation.
    • To present several model systems for studying these processes.
    • To introduce a novel approach using virus transformation to inhibit differentiation.

    Main Methods:

    • Discussing challenges in molecular mechanism research.
    • Describing various model systems.
    • Employing virus transformation to inhibit differentiation in chick primary mesenchyme precursor cells.
    • Cloning and culturing transformed cells for biochemical analysis.

    Main Results:

    • Virus transformation effectively inhibits differentiation in chick primary mesenchyme precursor cells.
    • The transformed cells provide a model for biochemical analysis of differentiation inhibition.
    • This approach allows for the study of molecular mechanisms underlying differentiation.

    Conclusions:

    • Virus transformation offers a novel strategy to study the molecular basis of cell differentiation.
    • Biochemical analysis of transformed cells can elucidate mechanisms of differentiation inhibition.
    • This model system contributes to understanding fundamental processes in developmental biology.