meiosis steps
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| homologous chromosomes line up in the center of the cell | metaphase I
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| spindle fibers pull homologous pairs to ends of the cell | anaphase I
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| 4 haploid (N) daughter cells form | telophase II
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| cells undergo a round of DNA replication | S phase
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| sister chromatids separate from each other | anaphase II
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| 2 haploid (N) daughter cells form | telophase I
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| spindle fibers attach to the homologous chromosome pairs | prophase I/ metaphase I
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| individual chromatids move to each end of the cell | anaphase II
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| crossing-over (if any) occurs | prophase I
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| What's the difference between prophase I and II? | crossing over changes genes in prophase I
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| Compare the number and type of cells that result from meiosis vs. mitosis. | Mitosis: same Meiosis: amount is 1/2, not genetically identical
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| How do the genetic content of cells resulting from mitosis and meiosis differ? | Mitosis: identical Meiosis: genetic variation (crossing-over)
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| Describe the similarity and difference between meiosis I and meiosis II. | M I: crossing-over M II: no crossing-over
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| If a diploid cell containing 28 chromosomes undergoes meiosis, how many chromosomes will each daughter cell have? | 14 chromosomes
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| the individual chromosome moves apart | anaphase II
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| spindle fibers pull homologous pairs to the ends of the cell | anaphase I
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| the chromosomes line up across the middle of the cell | M II
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| chromosomes become visible | prophase I & II
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| sister chromatids separate into individual chromosomes | anaphase II
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| nuclear envelope reforms | telophase II & telophase I
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| the nucleolus disappears and the nuclear envelope breaks down | prophase I
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| each chromosome is connected to a spindle fiber | prophase II & metaphase II
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