Monday, August 15, 2011

Explain to me the difference between Mitosis and Meiosis?

meiosis produces genetically identical offspring, you have logous chromosomes which separate during anaphase, during metaphase you do have crossing over of logues during synapsis. The diploid number in prophase is reduced to haploid number in anaphase, this is done by spindles (microtubules) attatching to the centrosome of the logue and pulling towards the poles, or centromeres of the cell. during meiosis you have logues which separate in the first phase of meiosis, then, whose chromatids are then reduced to 1 per daughter cell in meiosis two. so basically in meiosis you have a pair of hologous chromosome, a tetrad, which separates into a dyad or sister chromatids, so now you have 2 daughter cells with a single dyadic chromosome a piece, aka sister chromosomes, who then undergo another separation into monadic chromosomes or individual sister chromatids , forming 4 daughter cells with 1/2 the number of chromosomes. Crossing over occurs in the first phase of meiosis during metaphase synapsis.

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