Metaphase
Metaphase - Related Videos
09:11
Techniques for Imaging Prometaphase and Metaphase of Meiosis I in Fixed Drosophila Oocytes
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Cited by 20 •
2016
We present protocols for the collection, preparation, and imaging of mature Drosophila oocytes. These methods allow the visualization of chromosome behavior and spindle assembly and function during meiosis.
10:39
Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II
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Cited by 21 •
2018
Oogenesis in mammals is known to be error-prone, particularly due to chromosome missegregation. This manuscript describes chromatin spread preparation methods for mouse prophase, metaphase I and II-staged oocytes. These fundamental techniques allow for the study of chromatin-bound proteins and chromosome morphology throughout mammalian oogenesis.
12:46
Using Fluorescence In Situ Hybridization (FISH) to Monitor the State of Arm Cohesion in Prometaphase and Metaphase I Drosophila Oocytes
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Cited by 7 •
2017
This manuscript presents a detailed method for generating X-chromosome arm probes and performing fluorescence in situ hybridization (FISH) to examine the state of sister chromatid cohesion in prometaphase and metaphase I arrested Drosophila oocytes. This protocol is suitable for determining whether meiotic arm cohesion is intact or disrupted in different genotypes.
07:14
Live Cell Imaging to Assess the Dynamics of Metaphase Timing and Cell Fate Following Mitotic Spindle Perturbations
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Cited by 5 •
2019
Here we present a protocol to assess the dynamics of spindle formation and mitotic progression. Our application of time-lapse imaging enables the user to identify cells at various stages of mitosis, track and identify mitotic defects, and analyze spindle dynamics and mitotic cell fate upon exposure to anti-mitotic drugs.
12:47
Spectral Karyotyping to Study Chromosome Abnormalities in Humans and Mice with Polycystic Kidney Disease
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Cited by 12 •
2012
Spectral Karyotyping (SKY) is an advanced cytogenetics technique to identify genomic and chromosomal aberrations. This technique takes advantage of chromosome painting probes, which allow classification of all chromosomes. SKY can also identify complex chromosome aberrations and segregation defects in mice and humans with various diseases, including polycystic kidney disease.
FAQs
Attachment at the kinetochore provides the physical connection between each chromosome and spindle fibers from opposite poles. This arrangement positions chromosomes for the later separation of genetic material, rather than allowing chromosomes to remain independently located in the cell. Its accuracy is therefore central to faithful chromosome segregation and helps explain why attachment errors matter biologically.
Metaphase must be interpreted differently in mitosis and meiosis because chromosomes do not behave identically in the two division processes. The shared stage name therefore does not imply an identical pattern of chromosome organization or distribution. Comparing the division context is essential when using metaphase observations to study inheritance or chromosome segregation.
The spindle assembly checkpoint acts as a control point before chromosome separation. It verifies that chromosomes are correctly connected to spindle fibers through their kinetochores, and separation begins only after this connection has been assessed. This checkpoint links the physical state of chromosome attachment to the timing of division and helps explain how inaccurate distribution can arise.
Metaphase is especially informative when the goal is to investigate chromosome-segregation errors such as aneuploidy. Because chromosomes are condensed and their attachments can be examined at a defined stage, researchers can relate visible chromosome organization to later problems in genetic distribution. This makes metaphase useful for studying mechanisms underlying inaccurate inheritance.
Microscopy can identify metaphase by examining condensed chromosomes arranged across the cell’s equatorial plane, together with spindle fibers extending from opposite poles. These features provide practical visual criteria for distinguishing this stage within dividing cells. Researchers can then select suitable metaphase observations for closer analysis of chromosome arrangement and segregation-related features.
Metaphase provides a practical window for microscopy and cytogenetic analysis because chromosomes are condensed and arranged in a clearly defined cellular configuration. Researchers can use this stage to examine chromosome organization rather than relying only on indirect evidence from the entire division process. The resulting observations support studies of segregation, inheritance, and chromosome-number errors.