Metaphase occurs during meiosis and mitosis. These processes are how most cells reproduce to make two new cells. Some use binary fission.
Yes, ths chromosomes remain diploid in metaphase I.
It occurs in metaphase.
Non-disjunction is the failure of a pair of chromosomes or chromatids to separate. Since this happens in both metaphase I and II, non-disjunction can occur in either stage.In metaphase I it is the failure of the two homologous chromosomes in the pair to separate. In this case all of the gametes will be affected.In metaphase II it is the failure of the two sister chromatids to separate. In this case only half of the gametes are affected.Non-disjunction is the cause of a number of genetic conditions eg Down syndrome, Triple-X syndrome.See http://en.wikipedia.org/wiki/Nondisjunction
it takes place in the metaphase
prophase, metaphase, anaphase, telophase
Yes, alignment of tetrads at the metaphase plate occurs in meiosis, specifically during meiosis I when homologous chromosomes pair up as tetrads. In mitosis, individual chromosomes align at the metaphase plate.
DNA replication occurs during Interphase. This is not normally part of the cell division cycle but interphase must occur before subsequent stages such as prophase and metaphase can occur.
ProphaseMetaphaseAnaphaseTelophaseSometimes, people will include a fifth event, called prometaphse, where the nuclear envelope disappears and the spindles form. Generally, this phase is classified with prophase.
In metaphase I of meiosis, homologous chromosomes align at the cell's equator in pairs, while in metaphase of mitosis individual chromosomes align. Additionally, in meiosis I, genetic recombination and crossing over can occur between homologous chromosomes, increasing genetic diversity.
No, homologous chromosomes do not pair up during metaphase 2 as they do in metaphase 1. In metaphase 2, individual chromosomes line up along the metaphase plate.
Metaphase 1 The chromosomes line up on the equatorial (metaphase) plate. Metaphase 2 Kinetochores of the paired chromatids.
It is during the anaphase of meiosis that the replicated homologous chromosomes line up next to each other at the cell's equator.