anaphase


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to anaphase: anaphase lag

anaphase

 [an´ah-fāz]
the third stage of division of the nucleus of a cell in either meiosis or mitosis.

an·a·phase

(an'ă-fāz),
The stage of mitosis or meiosis in which the chromosomes move from the equatorial plate toward the poles of the cell. In mitosis a full set of daughter chromosomes (46 in humans) moves toward each pole. In the first division of meiosis one member of each homologous pair (23 in humans), consisting of two chromatids united at the centromere, moves toward each pole. In the second division of meiosis the centromere divides and the two chromatids separate with one moving to each pole.
[G. ana, up, + phasis, appearance]

anaphase

/ana·phase/ (an´ah-fāz) the third stage of division of the nucleus in either meiosis or mitosis.

anaphase

(ăn′ə-fāz′)
n.
The stage of mitosis and meiosis in which the chromosomes move to opposite ends of the nuclear spindle.

anaphase

[an′əfāz]
Etymology: Gk, ana + phainein, to appear
the third of four stages of division of the nucleus in mitosis and in each of the two divisions of meiosis. In anaphase of mitosis and of the second meiotic division, the centromeres divide, and the two chromatids, which are arranged along the equatorial plane of the spindle, separate and move to the opposite poles of the cell, forming daughter chromosomes. In anaphase of the first meiotic division, the pairs of homologous chromosomes separate from each other and move intact to the opposite poles of the cell. See also cytokinesis, interphase, meiosis, metaphase, mitosis, prophase, telophase.
enlarge picture
Anaphase

an·a·phase

(an'ă-fāz)
The stage of mitosis or meiosis in which the chromosomes move from the equatorial plate toward the poles of the cell. In mitosis a full set of daughter chromosomes (46 in humans) moves toward each pole. In the first division of meiosis, one member of each homologous pair (23 in humans), consisting of two chromatids united at the centromere, moves toward each pole. In the second division of meiosis, the centromere divides, and the two chromatids separate, with one moving to each pole.
[G. ana, up, + phasis, appearance]

anaphase

A stage in cell division (MITOSIS) in which the separated individual chromosomes migrate to opposite ends of the cell in preparation for the division of the cell into two new individuals.

anaphase

a stage of nuclear division in eukaryotic cells (see EUCORYOTE), occurring once in MITOSIS and twice in MEIOSIS. The main process involved is the separation of chromosomal material to give two groups of chromosomes which will eventually become new cell nuclei. This important step is controlled by SPINDLE MICROTUBULES (or fibres) which run from the organizing centre at each pole to every chromosome, the point of attachment being the kinetochore of the CENTROMERE (see METAPHASE).Various theories for chromosomal movement have been put forward, including:
  1. active repulsion of chromosomes,
  2. the idea that when sliding past each other the microtubules may act as tiny muscles (the ‘sliding filament’ theory), and
  3. a suggestion that the microtubules are disassembled at the poles, so ‘reeling in’ the attached chromosomes.

anaphase

the third stage of division of the nucleus of a cell in either meiosis or mitosis.
References in periodicals archive ?
2012) report that metaphases with misalignment of chromosomes on the equatorial plate or colchicine metaphase, as well as delayed chromosomes in anaphase and/or telophase, or anaphase and telophase bridges, result in formation of cells with different chromosome numbers, and chromosome structural changes.
Aurora A kinase remained enriched at centrosomes throughout anaphase and during cytokinesis, although--even in high-expressing cells--AAK only faintly associated with MTs but was not enriched on midzone MTs (Fig.
Number of anaphases is changed differently in different concentrations and treatment.
3 show that HMPPSO can quickly converge to global minimum on the Griewank function while SPSO and MPPSO nearly stopped at anaphase.
Next, the chromosomes exhibit pole-ward migration from metaphase to anaphase because of the inherent tendency of the springs to shorten when they are not under tension (Figures 1C and 2C).
Persistent nucleolus phenomenon was not observed in some metaphase cells of both varieties and only in anaphase cells of 'Stahl' progenitor (Figure 1F).
The autosomes, as well as the X chromosome, segregate reductionally in anaphase I and divided equationally during the second division.
In our test case with altogether 22 stacks, we trained the classifier to detect cells in metaphase and anaphase when the spindle apparatus is notably expressed.
The genotoxic effects that were observed in the present study included, multipolar anaphase, fragments, and deformed nucleus.
Callan (1949) proposed that telomeres did not replicate until anaphase; sister telomere attachment would be essential for the integrity of the terminal association until anaphase I.
All the chromosomes migrate synchronously at anaphase I, and at metaphase II nine chromosomes are seen (Fig.
Micronuclei (MN) are one of such biomarkers that are cytoplasmic chromatin masses with the appearance of small nuclei that arise from lagging chromosomes at anaphase or from acentric chromosome fragments.