anonymous
  • anonymous
can someone help me with mitosis and meiosis?
Biology
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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anonymous
  • anonymous
Mitosis consists of 4 different stages. - Prophase Homologous chromosomes pair up and exchange segments, based on their size and shape. - Metaphase Pairs of homologous chromosomes line up - Anaphase Split up - Telophase Two haploid cells are formed, but chromosomes are stilled doubled Sorry thats only very basic but I can't think of the rest right now.
anonymous
  • anonymous
its ok. because my eoc is monday i just needed a slight review.
anonymous
  • anonymous
hey if you want more, meiosis is has 2 different part Meiosis 1 and Meiosis 2 In meiosis 1 the crossover and duplication occurs. However in Meiosis 2 the segregation part occurs. If you want more depth I can go in more depth

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anonymous
  • anonymous
yeah could you go more in depth?
anonymous
  • anonymous
Meiosis 1 consist of 4 different phase Prophase Metaphase Anaphase Telophase Prophase 1 has the crossover. This is where different chromosomes exchange information (this is where DNA diversity between the child and parent comes from, otherwise without the cross over we'd be clones) Metaphase 1 is when the chromosome pair all lines up on the equilatorial plate of the cell Anaphase 1 is when the chromosome pair segregates to the opposite end of the cell (at the centrosome end.) Telophase 1 is when cytokenisis occurs ( i forgot how to write it) In Meiosis 2 you have the same process occuring, just now you have meiosis 2 occuring in 2 different cells that were created in Meiosis 1. Those 2 cells both have one pair of chromosome. All the same phase occur in the same order. HOWEVER there is no crossover anymore, the chromosome stay the same forever. What occurs that is different is when you hit anaphase 2, the chromosome segregates at opposite end ( at the centrosome) and now they didn't segregates in pair of chromosome but in single chromosome. So when telophase 2 occurs you have cytokinisis that creates 2 haploid cell with 2 different chromosome! I hope you understand.
anonymous
  • anonymous
OMG you made perfect sense, like thats the first time I think I understood this:)
anonymous
  • anonymous
My pleasure good luck on whatever test you have!
anonymous
  • anonymous
thank you so much!

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