Meiosis works in several stages, starting with Interphase. Further steps: In interphase, a cell grows to its full size, and duplicates its chromosomes. You end up with multiple pairs of identical chromatids stuck together. You still can't see them though, it's just a bunch of goop. The centrioles also duplicate here. You now get into Meiosis 1, which starts with prophase 1. This is the longest part of meiosis. Here, the chromatin condense into visible chromosomes. Now, through synapsis, homologous chromosomes, or chromosomes that control the same genetic characteristics, pair up. You now have a group of four chromatids that is called a tetrad. These pairs also swap similar segments while "crossing over". Now in Metaphase 1, the nuclear membrane is gone and the separated centromeres have spindles that form between them. The chromosomes move towards the metaphase plate as the microtubules attach to their centromeres. Moving into Anaphase 1, the tetrads split up as the microtubules become shorter. The chromosomes are pulled apart from each other and therefore the homologous chromosomes are separated. Now in Telophase 1, nuclear membranes form around the two sets of chromosomes. The sister chromatids in this are not the same due to them "crossing over". The cell is split in two and two daughter cells are formed. In prophase 2, the new nuclear membranes break down and spindles form again. In metaphase 2, the spindle fibers attach to both sides of the chromosome centromeres ... Logitech Indoor Security Master Buy Online
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