anaphase


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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

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

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.
References in periodicals archive ?
Figure 2A-E shows zygotes at late anaphase of the first meiosis (Fig.
In mouse embryonic stem cells, RNA interference studies revealed that condensins I and II are required for ES cell proliferation and that their loss leads to delayed initiation of anaphase and formation of enlarged and misshapen interphase nuclei [43].
Additionally, human CAPD3 (hCAP-D3) binds to pRb in an LXCXE-dependent manner, and [RB1.sup.[DELTA]L/[DELTA]L] cells displayed an inefficient localization of condensin II on chromosomes, delayed progression to metaphase, and lagging chromosomes in anaphase [26].
The pI-17[alpha] expression levels correlated positively with the frequency of anaphase aberrations (p = 0.005): the higher the levels of the centromeric noncoding RNAs, the higher the percentage of cells that showed bridges and/or lagging chromosomes.
Aurora B kinase is a protein that functions in the attachment of the mitotic spindle to the centromere, which is expressed during metaphase, anaphase and, cytokinesis in CMs [34].
However, H3S10P prevalence extended along the chromosomes, with completion observed during prometaphase and remaining evident at the metaphase plate, but disappearing during anaphase and telophase (Figure 3).
Prior to anaphase, the CPC is highly enriched at the inner centromere, and ABK activity contributes to spindle and kinetochore assembly, spindle assembly checkpoint signaling, and error correction (Tanaka et al., 2002; Emanuele et al., 2008; Lampson and Cheeseman, 2011; Moutinho-Pereira et al., 2013).
Microtubules formed arrays in the mitotic phase, including a preprophase band (PPB), the spindle apparatus at metaphase and anaphase, and the phragmoplast at telophase, in the CK treatment (Fig.
These stages are prophase, prometaphase, metaphase, anaphase, and telophase.
Damage of oocytes quality during warmer periods, leading to meiotic arrest of oocytes at anaphase and telophase stages, could be provoked by several factors.
Mitchel Street is currently creating "Metaphase" and "Anaphase," the follow-up to "Prophase," part of the Mitosis series.
INTRODUCTION: A micronucleus is the erratic nucleus that is formed during the anaphase of mitosis or meiosis.