Chromosome Segregation
Chromosome Segregation - Related Videos
06:21
Time-Lapse Imaging of Chromosome Segregation in Fluorescently Labeled Bacteria
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2026
Source: Schumacher, D., and Sogaard-Andersen, L. Fluorescence Live-cell Imaging of the Complete Vegetative Cell Cycle of the Slow-growing Social Bacterium Myxococcus xanthus. J. Vis. Exp. (2018)This video demonstrates the use of live-cell imaging to track fluorescently tagged chromosome origins during bacterial cell division. It captures chromosome segregation dynamics using time-lapse phase-contrast and fluorescence microscopy.
12:11
Analysis of Chromosome Segregation, Histone Acetylation, and Spindle Morphology in Horse Oocytes
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Cited by 21 •
2017
This manuscript describes an experimental approach to morphologically and biochemically characterize horse oocytes. Specifically, the present work illustrates how to collect immature and mature horse oocytes by ultrasound-guided ovum pick-up (OPU) and how to investigate chromosome segregation, spindle morphology, global histone acetylation, and mRNA expression.
06:39
Live Cell Imaging of Chromosome Segregation During Mitosis
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Cited by 1 •
2018
This protocol describes an easy and convenient method to label and visualize live chromosomes in mitotic cells using Histone2B-GFP BacMam 2.0 label and a spinning disc confocal microscopy system.
01:39
Chromosomal Theory of Inheritance
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2019
In 1866, Gregor Mendel published the results of his pea plant breeding experiments, providing evidence for predictable patterns in the inheritance of physical characteristics. The significance of his findings was not immediately recognized. In fact, the existence of genes was unknown at the time. Mendel referred to hereditary units as “factors.” The mechanisms underlying Mendel’s observations—the basis of his laws of segregation and independent assortment—remained elusive. In the late 1800s,...
02:31
Chromosome Replication
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2020
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin of...
FAQs
Accurate kinetochore attachment provides the physical link between spindle microtubules and duplicated chromosomes. As attachments form, chromosomes can align before separation begins. Cell-cycle checkpoints act to delay separation when these attachments are not properly established. This coordination helps prevent daughter cells from receiving an incorrect genetic complement.
The division type determines which chromosome units move apart. In mitosis, sister chromatids separate, whereas meiosis can direct homologous chromosomes toward opposite poles. This distinction connects chromosome segregation to two different biological outcomes: maintaining the genetic complement of daughter cells during growth and supporting inheritance through meiotic division. Comparing them helps explain normal development and reproductive biology.
Cell-cycle checkpoints prevent chromosome separation from proceeding until spindle microtubule attachments to kinetochores are properly established. Without this control, separation may occur despite incomplete attachment, increasing the possibility that daughter cells receive an incorrect chromosome complement. Checkpoint activity therefore links the physical mechanics of division with the broader requirement for genome stability.
A useful analysis follows whether spindle microtubules attach to kinetochores, whether chromosomes align, and whether the appropriate chromosome units move toward opposite poles. Checkpoint status adds an essential control point because separation should not proceed before proper attachments are established. Reviewing these events in sequence connects observable division stages with segregation accuracy.
Investigating chromosome segregation helps explain how cells preserve genome stability during division. Researchers can relate spindle attachment, chromosome alignment, and controlled separation to whether daughter cells receive the correct genetic complement. This information provides a foundation for cell biology and genetics research, while also clarifying how errors in division can affect normal growth and development.
Errors in chromosome segregation can produce aneuploidy, and aneuploidy can contribute to developmental disorders, infertility, and cancer. Studying the process allows researchers to connect faulty chromosome distribution with these biological and disease-related outcomes. This makes segregation research relevant not only to basic biology, but also to investigations of inheritance, development, and disease mechanisms.