Meiosis Worksheet – Flashcards
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homologous chromosomes line up in the center of the cell
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metaphase I
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spindle fibers pull homologous pairs to ends of the cell
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anaphase I
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4 haploid (N) daughter cells form
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telophase II
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cells undergo a round of DNA replication
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S phase
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sister chromatids separate from each other
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anaphase II
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2 haploid (N) daughter cells form
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telophase I
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spindle fibers attach to the homologous chromosome pairs
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prophase I/ metaphase I
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individual chromatids move to each end of the cell
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anaphase II
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crossing-over (if any) occurs
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prophase I
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What's the difference between prophase I and II?
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crossing over changes genes in prophase I
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Compare the number and type of cells that result from meiosis vs. mitosis.
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Mitosis: same # as parent, genetically identical
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?
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Mitosis: identical
Meiosis: genetic variation (crossing-over)
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Describe the similarity and difference between meiosis I and meiosis II.
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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?
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14 chromosomes
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the individual chromosome moves apart
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anaphase II
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spindle fibers pull homologous pairs to the ends of the cell
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anaphase I
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the chromosomes line up across the middle of the cell
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M II
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chromosomes become visible
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prophase I & II
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sister chromatids separate into individual chromosomes
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anaphase II
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nuclear envelope reforms
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telophase II & telophase I
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the nucleolus disappears and the nuclear envelope breaks down
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prophase I
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each chromosome is connected to a spindle fiber
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prophase II & metaphase II
