Biology / Unit 5 Bio 0985 short lesson, about 20 seconds
Meiosis Compared to Mitosis: Homolog Pairing and Crossover
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The idea
Meiosis differs from mitosis beyond division count: homologous chromosomes pair and cross over in meiosis I, an event absent from mitosis.
In practice
A mitotic cell's homologs never touch each other, while a meiotic cell's homologs synapse and exchange segments in prophase I alone.
Where people slip
Meiosis II's stages resemble mitosis closely — these differences belong to meiosis I specifically, not to meiosis as a whole.
Your place on the trail
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