The alignment of the chromosomes, with sister chromatids on each side of the metaphase plate ensures the two new cells will be identical. The sister chromatids represent the two new strands of DNA created from one chromosome during the synthesis stage of interphase.
Why is it important for chromosomes to line up in the middle of the cell?
In animal cells, the chromosomes line up in the center of the cell. … Therefore, a safety mechanism called the spindle assembly checkpoint ensures that all of the chromosomes have correctly attached to the spindle before chromosome separation begins.
Why do chromosomes have to line up during metaphase?
Chromosomes line up on the metaphase plate in the second stage of cell division that is metaphase. During metaphase, chromosomes come together at the equator line because of the mitotic spindle fibers. These fibers emerge from the centrosome present at each pole of the cell.
Why do chromosomes need to line up at the equatorial plate during mitosis?
https://doi.org/10.1083/jcb.201807228) show that chromosome alignment ensures mitotic fidelity by promoting interchromosomal compaction during anaphase. During mitosis, chromosomes align at the spindle equator to establish a metaphase plate.
What is it called when chromosomes line up along the middle of the cell?
Metaphase: During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.
What do we say about the way homologous pairs of chromosomes line up on either side of the equatorial plate during metaphase I it is called?
Metaphase I. During metaphase I, the homologous chromosomes are arranged in the center of the cell with the kinetochores facing opposite poles. The homologous pairs orient themselves randomly at the equator.
What happens during metaphase?
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. These chromosomes then become visible. During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell.
What is the best explanation for why chromosomes line up in the center of the cell before starting to split apart?
Chromosomes line up at the metaphase plate, under tension from the mitotic spindle. The two sister chromatids of each chromosome are captured by microtubules from opposite spindle poles. In metaphase, the spindle has captured all the chromosomes and lined them up at the middle of the cell, ready to divide.
What would happen if metaphase is skipped?
If mitosis skipped metaphase then it would be able to make the daughter cells different from the parent cells. They would no longer be identical which would create a mutated cell. … If cytokinesis did not occur properly in meiosis 2 then the cytoplasm would not separate and there would not be two daughter cells.
How do chromosomes line up in mitosis?
In metaphase II of meiosis, and metaphase of mitosis, chromosomes line up along the metaphase plate due to the action of microtubule spindle fibres emanating from the centrosomes located at opposite cell poles. These fibres are attached to the chromosomes by kinetochores at the centromeres of the chromosomes.