Metaphase
(Science: cell biology) The stage of mitosis (and meiosis) following prophase and preceding anaphase.
Metaphase, from the ancient Greek μεÏ"α (after) and φασις (stage), is a stage of mitosis in the eukaryotic cell cycle in which condensed chromosomes, carrying genetic information, ...
metaphase plate
the cellular plane on which the chromosomes are aligned during mitosis or meiosis
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
The plane of the equator of the spindle into which chromosomes are positioned during metaphase.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Metaphase
Metaphase is a stage during the process of cell division (mitosis or meiosis). Usually, individual chromosomes cannot be observed in the cell nucleus.
Prometaphase
Presented in the digital fluorescence microscopy image above is a single rat kangaroo (PtK2) kidney cell in the early stages of prometaphase.
Metaphase I
Bivalents, each composed of two chromosomes (four chromatids) align at the metaphase plate. The orientation is random, with either parental homologue on a side.
Metaphase: Now all of the pieces are aligning themselves for the big split. The DNA lines up along a central axis and the centrioles send out specialized tubules that connect to the DNA. The DNA (chromatin) has now condensed into chromosomes.
Metaphase
Centrioles at opposite poles
Chromosomes line up on the equator of the spindle
Centromeres (kinetochores) attach to spindle fibres
Kinetochores consist of microtubules and "motor" proteins which utilise ATP to pull on the spindle ...
metaphase - stage of mitosis in which replicated chromosomes align at the center of the cell.
metaphase
[Gk. meta, middle + phasis, form]
The second stage of mitosis. During metaphase, all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle.
metapopulation ...
Metaphase (MET-uh-faze) The third phase of cell division, following prometaphase and preceding anaphase. In metaphase, the copied chromosomes align in the middle of the spindle.
metaphase The stage of eukaryotic cell division (mitosis or meiosis) in which the chromosomes line up at the equator of the cell. PICTURE ...
Metaphase The stage of mitosis (or meiosis) at which the chromosomes are at their most condensed and at which they are lined up in the centre of the spindle, about to divide.
Metaphase the second stage of mitosis or meiosis in which the chromosomes all line up in the center of the cell on the metaphase plate
(meta = between‚ with‚ after) ...
Metaphase I
Bivalents (tetrads) become aligned in the center of the cell and are attached to spindle fibers.
The chromosome alignment illustrated below is from a cell with a diploid chromosome number of 8.
Metaphase
A stage in mitosis or meiosis during which the chromosomes are aligned along the equatorial plane of the cell.
Microarray ...
Metaphase
At metaphase all the dyads have reached an equilibrium position midway between the poles called the metaphase plate. The chromosomes are at their most compact at this time.
Link to a discussion of the role of spindle fibers ...
Metaphase
Strasburger (1884) originally introduced this term for the stage of nulear division after (Gk. meta) the chromosomes (ch) have divided into chromatids, but from about 1905, ...
Metaphase II: Tension from spindle fibers aligns chromosomes at the metaphase plate.
Anaphase II: CHROMATIDS separate and begin moving to the poles.
Telophase II: CLEAVAGE FURROW forms beginning CYTOKINESIS.
Metaphase I is when tetrads line-up along the equator of the spindle. Spindle fibers attach to the centromere region of each homologous chromosome pair. Other metaphase events as in mitosis.
metaphase Stage in mitosis when chromosomes become aligned in the middle of the cell and firmly attached to the mitotic spindle but have not yet segregated toward opposite poles.
At Metaphase I the pairing brings the centromeres of the paired homologs to the metaphase plate in the center of the cell where the homologs separate (still composed of two chromatids) during Anaphase I.
2. Metaphase."Each V-shaped chromosome now undergoes longitudinal cleavage into two equal parts or daughter chromosomes, the cleavage commencing at the apex of the V and extending along its divergent limbs.
12 ...
... of Metaphase AgNOR Staining Patterns on Human Acrocentric Chromosomes ... Key Words: AgNOR, human acrocentric chromosomes, ribosomal gene activity, image ...
Full article ...
In CGH total genomic DNA from a test specimen and a normal genomic reference DNA are labeled with different fluorochromes and hybridized to normal metaphase chromosomes.
They become more compact and visible during metaphase of cell division. In interphase chromosomes, chromatin fibers are organized into 30 to 100 kb loops anchored in a supporting matrix within the nucleus.
The term which Janssens (1909) introduced for the nodes (Gk. chiasma; cross) where the individual chromosomes making up each pair remain in contact during the diplotene and diakinetic stages of prophase 1 and during metaphase 1 of meiosis.
[Gr. dia - apart; Gr. kinesis - movement]. The last stage of prophase 1 of meiosis, leading to metaphase of the first meiotic division. The chromosomes are at maximum condensation and the nuclear membrane breaks down.
Label two chromatids with each letter. This way they can line up the pairs of homologous chromosomes during metaphase I and demonstrate all of the phases of meiosis. This leads right into a lesson on dihybrid crosses and probability.
Colchicine An alkaloid from the autumn crocus that prevents polymerization of tubulin to form microtubules; as a consequence, it inhibits the cell cycle at metaphase.
Metaphase - phase of mitosis in which the chromosome pairs line up at the equator of the cell
Mitochondria - genetically independent organelles that produce energy for the cells along their many internal folds, called cristae ...
 See also: Chromosome, Cell, Chromosomes, Cells, Mitosis
  
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