During prophase, the two centrioles - which replicate independently of mitosis - begin recruiting microtubules - which may be thought of as cellular "ropes" or "poles" and forming a mitotic spindle between them.
en.wikipedia.org /wiki/Prophase (299 words)
NDI Terminology - prophase(Site not responding. Last check: 2007-10-22)
In mitosis, the stage during which the chromosomes become visible (because of supercoiling of DNA), the cell nucleus starts to lose its identity, and the centrioles begin to migrate.
In meiosis, the prophase of the first division consists of five stages: leptotene, zygotene, pachytene, diplotene, and diakinesis.
In the second meiotic division, prophase resembles that in mitotic division.
www.ndif.org /Terms/prophase.html (58 words)
BIOdotEDU(Site not responding. Last check: 2007-10-22)
This complex extends the length of the chromosome pair and is attached to the nuclear envelope.
This is one of the longest stages of Prophase I, and it is during this stage that biological information is exchanged between chromosome pairs.
This is the recondensation, or final stage of Prophase I. All of the chromosomes are now at their maximum density and degree of packing, and the chiasmata move along the length of each structure until they reach the ends of the chromosomes, a process called
Entry into M phase is allowed by the formation of the mitotic cyclin-Cdk complex known as M phase-promoting factor that occurs as a cell cycle regulatory mechanism in the G2 phase.
The first phase of mitosis within M phase is called prophase.
Late in prophase, kinetochores assemble on the centromeres.
of homologous chromosome pairing at the onset of meiotic prophase.
Scherthan, H. Chromosome behaviour in earliest meiotic prophase.
Scherthan, H., Weich, S., Schwegler, H., Heyting, C., Harle, M., and Cremer, T. Centromere and telomere movements during early meiotic prophase of mouse and man are associated with the onset of chromosome pairing.
the radiation-induced reversion of prophase is correlated with
In these examples, living cells in early prophase (D and H) were irradiated in the nucleus with 100 laser pulses of 532-nm laser light and followed by time-lapse video LM for 30 (E) or 90 (I) min before fixation.
However, similar prophase nuclei that are fixed 30 min after a nuclear irradiation (D-F) contain very little phosphorylated histone H1 The amount of phosphorylated histone H1 seen in prophase nuclei that are fixed 90 min after a nuclear irradiation is minimal and similar to that seen in surrounding nonirradiated interphase cells (K).
The prophase of an animal cell is when the chromosomes gradually shorten and thicken.
Toward the end of prophase the chromosomes migrate to the equatorial plane of the dividing nucleus and the mitotic spindle begins to be organized between the centrioles.
As the centrioles move to the opposite poles of the nucleus, the spindle enlarges and moves through the nuclear region.
In the pachytene region of the wild-type germ line, DAPI signals are again widely dispersed; early prophase nuclear polarization persists in the pachytene region of the syp-1 mutant germ line, with most nuclei in this region exhibiting an asymmetric distribution of chromatin.
Persistent polarized organization of prophase nuclei in syp-1 mutants is not a consequence of incomplete meiotic recombination
that is usually restricted to nuclei at the onset of meiotic prophase.
(B) Prophase cells imaged starting at NE perforation complete mitosis and cytokinesis normally; time as in A. (C) Higher magnification of the boxed regions in B show the rapid loss of individual Mts (top, single Mts) and the formation and motion of Mt bundles (bottom, bundles).
prophase cells was the formation of Mt bundles and foci by the
Top four rows of panels are oriented so that the NE is to the bottom of each series; bottom row is a metaphase cell; arrow shows a small focus of Mts; the dark sphere is a vacuole.
Plk1 promotes nuclear translocation of human Cdc25C during prophase(Site not responding. Last check: 2007-10-22)
The nuclear accumulation of active M-phase promoting factor (MPF) during prophase is thought to be essential for coordinating M-phase events in vertebrate cells.
However, the molecular mechanisms that control nuclear translocation of Cdc25C during prophase are unknown.
Remarkably, a mutant Cdc25C in which Ser198 is replaced by alanine remains in the cytoplasm when wild-type Cdc25C accumulates in the nucleus during prophase.
[No title](Site not responding. Last check: 2007-10-22)
If using a cell where 2n equals 6, then there would be 6 chromosomes and 12 individual chromatids.
The cell then goes into }{\insrsid2178059\charrsid4134498 Prophase 1 }{\insrsid329009\charrsid4134498 which is }{\insrsid2178059\charrsid4134498 much more complex}{\insrsid329009\charrsid4134498 than prophase in mitosis}{\insrsid2178059\charrsid4134498.
}{\insrsid13837798\charrsid4134498 Since there is no distinct prometaphase in meiosis, prophase 1 consists of both the prophase and prometaphase of mitosis.
Genetics Glossary P(Site not responding. Last check: 2007-10-22)
A Drosophila transposable element that has been used as a tool for insertion mutagenesis and for germline transformation.
The stage of prophase 1 of meiosis in which chromatids are first distinctly visible.
A sequence of letters, words, phrases, or nucleotides that reads the same regardless of direction, for instance what Adam said to Eve "Madam I'm Adam".
During the late prophase stage, the tapetum cells are usually microscopically visible.
Upon maturing, the pollen grains are released by the anther and made available for transport to a female reproductive organ called the stigma.
Of special interest are cross sections that present anthers during different stages of development, especially evolution of mature pollen grains from microspore mother cells.
PAG-XI-W267: TELOMERE BEHAVIOR AT MEIOTIC PROPHASE IN HIGHER PLANTS(Site not responding. Last check: 2007-10-22)
During meiotic prophase, telomeres attach to the nuclear envelope and cluster in a chromosome end arrangement called the bouquet.
The widely conserved bouquet is unique to meiosis and thought to facilitate homologous chromosome synapsis and recombination.
To better understand the role of telomeres during meiosis, we have used 3-D molecular cytology to characterize the nuclear architecture of pollen mother cells fixed during meiotic prophase.
