In metaphase of mitosis and meiosis II, it is sister chromatids that line up along the equator of the cell. Spindle fibers shorten, and the chromosomes of each homologous pair start to separate from each other. … Spindle fibers line up the sister chromatids of each chromosome along the equator of the cell.
What happens during metaphase of mitosis?
During metaphase, the kinetochore microtubules pull the sister chromatids back and forth until they align along the equator of the cell, called the equatorial plane. There is an important checkpoint in the middle of mitosis, called the metaphase checkpoint, during which the cell ensures that it is ready to divide.
What is the difference between metaphase and metaphase 1?
Hint: Meta means second and phase means stage, hence metaphase is the second stage of meiosis and mitosis.
Distinguish between metaphase of mitosis and metaphase I of meiosis.
|Metaphase of mitosis||Metaphase I of meiosis|
|Individual chromosome align at metaphase plate||Tetrad of chromosomes lie at the metaphase plate.|
Why do chromosomes coil during mitosis?
Why do chromosomes coil during mitosis? … E) The chromosomes are “reeled in” by the contraction of spindle microtubules, motor proteins of the kinetochores move the chromosomes along the spindle microtubules, and nonkinetochore spindle fibers serve to push chromosomes in the direction of the poles.
What causes chromosomes to align?
In addition to microtubules from both spindle poles that attach to all of the chromosomes, astral microtubules that are connected to the cell cortex — a protein layer lining the cell membrane — act to pull the spindle poles back and forth within the cell until the spindle and chromosomes align down the center axis of …
What 3 things happen in metaphase?
In metaphase, the mitotic spindle is fully developed, centrosomes are at opposite poles of the cell, and chromosomes are lined up at the metaphase plate.