https://padlet.com/sjcat2772/t32pwsh27glz Stages of Meiosis en-us 2018-02-22 19:35:59 UTC 2018-02-22 20:04:55 UTC hello@padlet.com sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234447948 Homologous chromosomes- chromosome pairs that are similar but not identical because they may have different gene alleles. Sexually reproducing organisms have 2 sets

Crossing Over- when homologous chromosomes  come close together and exchange portions of their chromatids which produces new combinations of alleles

Haploid Cell- sex cells that have half the number of chromosomes. Ex. Egg and sperm (1 set=1N).

Diploid Cells-  body cells 
that have the full number of chromosomes. Ex. Skin, nerve, bone (2 sets-2n).

]]> 2018-02-22 19:38:45 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234447948 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234456279 Interphase before Meiosis 1- Cells have increased in size, produced RNA, synthesized protein, and cells have DNA. 

]]> 2018-02-22 19:50:42 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234456279 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234457608 Prophase 1- nuclear envelope deteriorates, spindle fibers & centrioles appear, chromosomes pair up with their homologous partner to form a tetrad, and crossing over occurs between non-sister chromatids. ]]> 2018-02-22 19:52:50 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234457608 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234458733 Metaphase 1- Spindle fibers attach to the centromeres, homologous chromosomes line up in pairs across the middle of the cell]]> 2018-02-22 19:54:42 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234458733 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234459682 Anaphase 1- Spindle fibers shorten and pull the chromosome pairs apart, one chromosome from each pair moves to the opposite end of the cell
(There is more than 8 million different configurations to how chromosomes can be independently assorted)]]> 2018-02-22 19:56:20 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234459682 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234460874 Telophase 1 and Cytokinesis- Spindle fibers disappear and the nuclear membrane reforms, cell membrane pinches inward and two haploid cells are formed. ]]> 2018-02-22 19:58:23 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234460874 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234461629 Prophase 2- the nuclear envelope deteriorates and spindle fibers and centrioles appear.]]> 2018-02-22 19:59:40 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234461629 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234462126 Metaphase 2- Spindle fibers attach to the centromeres, the chromosomes line up singularly across the middle of the cell]]> 2018-02-22 20:00:31 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234462126 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234462543 Anaphase 2- Spindle fibers shorten and separate the chromosomes and sister chromatids are pulled apart and move to opposite ends of the cell]]> 2018-02-22 20:01:08 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234462543 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234463124 Telophase 2 and Cytokinesis- Spindle fibers disappear and the nuclear membrane reforms, the cell membrane pinches inward and two cells are formed. Then four haploid cells are produced, so two from each division]]> 2018-02-22 20:02:10 UTC https://padlet.com/sjcat2772/t32pwsh27glz/wish/234463124 sjcat2772 https://padlet.com/sjcat2772/t32pwsh27glz/wish/234464060

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