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Chromatid pairs are fully visible the nucleolus and the nuleus membrane disintegrate and spindle fibers begin to form?
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∙ 12y ago
phophase
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∙ 12y ago
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Chromatid pairs are fully visible the nucleolus and the nucleus membrane disintegrate and spindle fibers begin to form?
prophase
What do the phases in meiosis do?
Prophase: coiling + shortening of the DNA into rods. the nucleolus and the nuclearmembrane break down.Metaphase: chromosomes line up in the middle of the cell.Anaphase: Chromatids of each chromosome separateTelophase: spindle fibers disassemble. chromosomes uncoilCytokinesis: the pinching inward of cell membrane. Cleavageis formed. Micro-filaments aid in splitting the cell.
What has occurred at the end of Prophase?
At the end of prophase all of the chromosomes(chromatids joined at the centromere) are now floating around the cells and the spindle fibers are formed. Then you go into Metaphase where the chromosomes line up in the center of the call and the centromeres attach to the spindle fibers. Hope that helped!:)
What spindle fibers disappear and the nuclear membrane reappears to form two new daughter cells?
This occurs during telophase of mitosis.
What phase of the cell cycles are these cells in?
The five cell cycles are: Telophase (Cell wall pinches in, nuclear membranes are formed, two daughter cells are produced.) Interphase (You can cell the nucleolus, you can see uncoiled chromatin, you cannot see chromosomes.) Prophase (Chromatin uncoils, chromosomes appear, chromosomes duplicate to form sister chromatids, spindle forms between centrioles.) Metaphase (Chromosomes move to the middle of spindles.) Anaphase (Sister chromatids are pulled to opposite sides of cell, each chromatid is now a chromosome.)
Chromatid pairs are fully visible the nucleolus and the nucleus membrane disintegrate and spindle fibers begin to form?
prophase
In what stage does the nucleolus and nuclear membrane disappear and spindle fibers and centrioles appear?
The Microtubules of the bipolar spindle assemble and attach sister chromatids to opposite spindle pole, This happens at the Transition into Metaphase.
What two structures disappear during prophase?
During prophase, the nuclear membrane and the nucleolus dissolve and disappear.
What attaches the spindle fiber to the chromatid?
the kinetochore
Name four things that happen during telophase?
1:Chromatids are pulled to opposite poles of cell. 2:Nuclear Envelope and Nucleolus reform. 3:Chromosomes uncoil. 4:Spindle Fibers disintegrate.
The chromatid is attached to a spindle fiber by what?
one word Centromere
Name 2 things that occur during telophase 1?
The nuclear membrane and nucleolus (these had disappeared during prophase). They had originally disappeared during prophase because the chromatin condensed into chromatids and then coiled into chromosomes and needed to seperate. They reappear during telophase because the chromatid uncoils again to form chromatin. This means that the cell no longer needs to seperate so it can reform the membrane and nucleolus.
A chromatid is attached to a spindle fiber by the what?
by the pulling apart movement required to make two new daughter cells. spindle fibers attach to the opposite ends of the poles during metophase which creates the chromosomes to split. this process of splitting is also known as binary fission
What disappears during prometaphase?
Telophase is the final stage of cell division. During telophase, the spindle fibers disappear due to the depolymerization of the microtubules.
How do you perform mitosis?
Mitosis is composed of 5 steps: 1)prophase 2) metaphase 3) anaphase 4) telophase 5) cytokinesis Beginning from prophase, the nuclear envelope and nucleolus begin to dissolve and the spindle fibers start to form. In metaphase, the chromosomes form a line down the middle of the chromosome and the fully formed spindle fibers attach to the kinetochore, which are in turn attached to the centromere which is holding the sister chromatids ,which make up the chromosome, together. During anaphase, the sister chromatids are pulled apart and the centromere ruptures. Each chromatid is pulled to a pole on the opposite side of the cell. Telophase is simply prophase in reverse. The nucleolus is reformed, one around each chromatid, as well as the nuclear envelope and the spindle fibers begin to dissolve. Lastly, cytokinesis is the physical separation of the cell into two daughter cells,
What is the definition of prophase?
Prophase is the first step in Mitosis (part of interphase) and it's when the chromatid pairs become visible and the spindle is beginning to form.
What are the events that take place in prophase?
Chromatin in the nucleus condenses to form chromosomes. The pairs of centrioles move to opposite sides of the nulceus. Spindle fibers form a bridge between the ends of the cell. the Nuclear envelope breaks down.
