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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.
During mitosis chromosomes are moved and separated through the use of spindles composed of?
microtubules. These microtubules are formed from the centrosomes and attach to the chromosomes at their kinetochores. As the microtubules shorten and lengthen, they pull the chromosomes apart, ensuring that each daughter cell receives the correct number of chromosomes.
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.
When does the spindle attach to the kinetochores?
Prometaphase
Spindle fibers are present in what stage of mitosis?
Prophase its actually in an indistinct phase called prometaphase and they are formed by the kinetochores putting together microtubules, which makes up the microtubules
Which of the following is true of kinetochores?
They are sites at which microtubules attach to chromosomes.
Do microtubules in kinetochores shorten or lengthen?
disassemble
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.
During mitosis chromosomes are moved and separated through the use of spindles composed of?
microtubules. These microtubules are formed from the centrosomes and attach to the chromosomes at their kinetochores. As the microtubules shorten and lengthen, they pull the chromosomes apart, ensuring that each daughter cell receives the correct number of chromosomes.
What event does interkinesis lack compared to premeiotic interphase?
the kinetochores do not connect to the microtubules so the cell goes in to G0 phase in interkinesis as opposed to premeiotic interphase.
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.
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 is the kinetichore?
Kinetochores are proteinaceous region adjacent to the centromere of a sister chromatid pair Kinetochores do the interacting with the mitotic spindles The mitotic spindles with which kinetochores interact are called kinetochore microtubules
When does the spindle attach to the kinetochores?
Prometaphase
Spindle fibers are present in what stage of mitosis?
Prophase its actually in an indistinct phase called prometaphase and they are formed by the kinetochores putting together microtubules, which makes up the microtubules
What is the phase of mitosis dose the microtubules at eatheir and of a cell attach to the chromsomes and engagein a tug of war?
Metaphase
What phase do chromosomes attach to spindle fibers?
In metophase and anaphase of the cell cycle.
