How does a tetrad form in prophase I of meiosis?
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In Prophase 1 the two homologous chromosomes align one next to the other. A Chromosome consists of two sister chromatids so 2 chromosomes correspond to 4 chromatids. Hence the "tetrad".
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In pro phase 1 the two homologous chromosomes align one next to the other .A chromosome consist of two sister chromatids so 2 chromosomes correspond to 4 chromatids .Hence the tetrad.
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