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l_______________nucleus______________l
-purpose of meiosis - to create genetically variable, haploid (n) sex cells
male gamete + female gamete --> new genome
meiosis I: the reduction division (2n --> n)
-prophase I:
-homologous chromosomes (tetrad)
-crossover (nonsister chromatids)
-metaphase I:
-lined up tetrads -- spindle fiber
-crossover (chromatids)
-anaphase I:
-tetrads separate; "homologs randomly separate"
-telophase I:
-finish cytokinesis or proceed immediately w/ meiosis II
prophase I:
-no chromosome replication (haploid)
-metaphase II:
-sister chromatids line up
anaphase II:
-each cell receives 1 kind chromosome
-telophase II:
-completes reforming nuclei
-cytokinesis: separates 4 new haploid cells
-meiosis --> haploid gametes or spores
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