Chromosomes line up with their centromeres on the equator during metaphase of any eukaryotic cell division: mitosis, meiosis I, or meiosis II.
During metaphase the arms of the chromosomes are spread out, but it will be the centromeres that lead the way towards the poles during anaphase. This is because in metaphase some spindle fibers, which are formed by the cytoskeleton, attach to the centromeres. It is the contraction of these fibers that pulls the chromosomes (daughter-chromosomes in mitosis and meiosis II) towards the poles in anaphase.
There is an important checkpoint during metaphase. If the spindle fibers are not correctly attached, division should stop. However, a few mistakes slip through the net, and sometimes both daughter-chromosomes of a pair (in other words, a pair of former sister-chromatids) move to the same pole. This phenomenon is called non-disjunction, and leads to an abnormal number of chromosomes in both daughter-nuclei.
during metaphase in mitosis
during metaphase
during metaphase
Metaphase
metaphase
chromosomes line up at the cell's equator.
chromosomes migrate to equator of the spindle apparatus
Metaphase is the third phase of mitosis, when the chromosomes line up at the equator of the cell.
metaphase
In Mitosis and Meiosis, this event is called Metaphase.
chromosomes line up at the spindle equator during metaphase! chromosomes line up at the spindle equator during metaphase!
The phase in which paired chromosomes line up on the equator of the cell is called metaphase.
Kinetochore Fibers
the answer is spindle!
when chromosomes line up along the equator of the cell
chromosomes line up at the cell's equator.
Metaphase.
At the stage of metaphase, chromosomes line up along the equator of the cell. Homologous chromosomes pair up.
chromosomes migrate to equator of the spindle apparatus
Metaphase
Metaphase is the third phase of mitosis, when the chromosomes line up at the equator of the cell.
cell equator or equatorial plane