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Prometaphase
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Why is the structure responsible for the movement of chromosome during anophase?
The Centrosome. It forms Centrioles which form spindle fibers. Some of the spindle fibers attach to the Kinetochore located on the Centromere of chromosomes. The spindle fibers work in conjunction with motor proteins to facilitate disjunction.
What is found in animal cells and aid in cellular reproduction?
There are a number of things. A pair of centrioles which are organizational sites for microtubules. The nuclear membrane dissolves and proteins attach to the centromeres creating the kinetochores. Microtubules attach at the kinetochores and the chromosomes begin moving. New membranes form around the daughter nuclei. The chromosomes disperse and are no longer visible under the light microscope. The spindle fibers disperse, and cytokinesis or the partitioning of the cell begins.
Chromosomes attached to the spindle fibers by undivided structures is called what?
Name of the Undivided Structures"The centromeres enable chromosomes to attach to spindle fibers." Not exactly. The centromeres are areas of DNA where the two sister chromatids touch. The spindle fibers actually bind to the kinetochore, a structure found on the chromosomes.
At prometaphase of mitosis?
During prometaphase, the nuclear envelope fragments and the spindle microtubules are able to reach the chromosomes. Each of the two chromatids of each chromosome, at this point, has a kinetochore. The microtubules attach to the kinetochores, forming "kinetochore microtubules" which basically jerk the chromosomes back and forth.
What event triggers a go-ahead signal for the M phase checkpoint?
Kinetochores of all chromosomes are attached to the spindle. Source: Mastering Biology
What does kinetochore do?
they are microtubles, they move the chromosomes to the equasion (metaphase plate) of the cell. they also make up the spindle fibers.
What phase do chromosomes attach to spindle fibers?
In metophase and anaphase of the cell cycle.
In mitosis what pulls the sister chromatids apart?
The spindle fibers. The spindle fibers that attach to the sister chromatids are called called chromosomal microtubles.
Chromatid pairs line up at equatorial plate?
In the metaphase stage of mitosis. They line up in the equatorial plate and spindle fibers from the centrioles attach to their kinetochores
Which of the following is true of kinetochores?
They are sites at which microtubules attach to chromosomes.
What is responsible for moving chromosomes during mitosis?
The mitotic/meiotic spindle originating from the centrosomes and composed of microtubule subunits. Kinetochores provide the motive power.Read more: What_structure_is_responsible_for_moving_the_chromosomes_during
Why is the structure responsible for the movement of chromosome during anophase?
The Centrosome. It forms Centrioles which form spindle fibers. Some of the spindle fibers attach to the Kinetochore located on the Centromere of chromosomes. The spindle fibers work in conjunction with motor proteins to facilitate disjunction.
What is the middle of the mitotic spindle?
In the middle of mitotic spindle are the duplicated chromosomes held by kinetochores. These are protein structures are involved in pulling apart the sister chromatids.
What is found in animal cells and aid in cellular reproduction?
There are a number of things. A pair of centrioles which are organizational sites for microtubules. The nuclear membrane dissolves and proteins attach to the centromeres creating the kinetochores. Microtubules attach at the kinetochores and the chromosomes begin moving. New membranes form around the daughter nuclei. The chromosomes disperse and are no longer visible under the light microscope. The spindle fibers disperse, and cytokinesis or the partitioning of the cell begins.
Chromosomes attached to the spindle fibers by undivided structures is called what?
Name of the Undivided Structures"The centromeres enable chromosomes to attach to spindle fibers." Not exactly. The centromeres are areas of DNA where the two sister chromatids touch. The spindle fibers actually bind to the kinetochore, a structure found on the chromosomes.
What protein structure moves chromosomes?
During mitosis and meiosis, kinetochores move chromosomes across the spindle fibers. The kinetochores serve as vehicles and the fibers serve as roads.
What structure holds the sister chromatids to the spindle fibers?
Sister chromatids are held together by centromere and are attached to the spindle fibres by kinetochores during cell division.
