The process which you are talking about is "Meiosis"... Actually, this process is carried out in gamete producing cells like sperms and eggs. Meiosis process is divided into two parts: Meiosis I and Meiosis II.
Meiosis I has four phases: Prophase I, Metaphase I, Anaphase I nad Telophase I.
During Anaphase I of Meiosis I of Meiosis cell division, homologous pairs of chromosomes are separated and stretched toward opposite poles of the cell with the help of Microtubules organelle of the cell.
the stage is called the "first division"
Disjunction
inclusive : pvq : one or both have to be true exclusive : pV ( with a line under it but i dont know how to do that on my aptop) q :ony one coud be true
During anaphase I of meiosis the spindle fibers pull apart in homologous chromosomes. The spindle fibers are composed of micro-tubules. The spindle fibers continue to shorten during anaphase in order to bring the chromosomes at two poles.During anaphase I of meiosis the spindle fibers pull apart in homologous chromosomes. The spindle fibers are composed of micro-tubules. The spindle fibers continue to shorten during anaphase in order to bring the chromosomes at two poles.
The chromosomes split equally and move to the opposite sides of the cell.
The process described in your question is called anaphase. One can remember this step of the cell cycle easily because the chromosomes form 'A' shapes at the ends of the poles- and 'A' is of course the first letter of anaphase. The next step in the cell cycle is telophase- where the cell undergoes cytokinesis- splitting to form two new cells.
It is the failure of chromosome pairs to separate properly during cell division.
inclusive : pvq : one or both have to be true exclusive : pV ( with a line under it but i dont know how to do that on my aptop) q :ony one coud be true
Anaphase
During anaphase I of meiosis the spindle fibers pull apart in homologous chromosomes. The spindle fibers are composed of micro-tubules. The spindle fibers continue to shorten during anaphase in order to bring the chromosomes at two poles.During anaphase I of meiosis the spindle fibers pull apart in homologous chromosomes. The spindle fibers are composed of micro-tubules. The spindle fibers continue to shorten during anaphase in order to bring the chromosomes at two poles.
No. In mitosis the chromosomes separate once. In meiosis, in anaphase I, homologous chromosomes separate, but are still attached as sister chromatids. In anaphase II, the sister chromatids separate. So there are two chromosome separations in meiosis.
The chromosomes split equally and move to the opposite sides of the cell.
The process described in your question is called anaphase. One can remember this step of the cell cycle easily because the chromosomes form 'A' shapes at the ends of the poles- and 'A' is of course the first letter of anaphase. The next step in the cell cycle is telophase- where the cell undergoes cytokinesis- splitting to form two new cells.
The nuclear membrane fades from view
It is the failure of chromosome pairs to separate properly during cell division.
Depending on how much detail you want..... during anaphase the sister centromeres move apart and move to the polar spindals (formed from the old nuclear membrane), with the centromeres clearly devided
Anaphase
They pull the sister chromatids apart.
It all begins from mitosis. Mitosis is the process of the cell division. Mitosis starts when the chromatin within the cell begins to rearrange into orderly strand called chromosomes. The chromosomes then move into pairs. After that, the chromosome pairs begin to pull apart from each other. Eventually, the chromosome pairs split apart into two new cells with the same makeupas the original cell.