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In phrophase 1 the first substage of meiosis I
* the chromosomes ccondense and become visible
*the centrioles form and move toward the poles
*the nuclear membrane begins to dissolve
*the homologs pair up and forming a tetrad. each of the tetrad is comprised of four chromatids the two homologs, each with their sister chromatic.
*the homologous chromosomes will swap genetic material ina process known as crossing over serves to increase genetic diversity by creating fourr unique chromatids.
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