Final answer:
Meiosis is the process in which an organism having 12 chromosomes in its sex cells produces four daughter cells with haploid chromosome sets, ensuring genetic diversity in offspring.
Explanation:
Meiosis is the correct process that an organism undergoes when it has 12 chromosomes in its sex cells and produces four daughter cells, each with haploid chromosome sets. During meiosis, the cells undergo two rounds of nuclear division, resulting in four cells with half the number of chromosomes as the parent cell, ensuring genetic diversity in offspring.
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