Question

multiple choice question
meiosis reduces the chromosome number by half

○ because crossing over occurs during prophase i.
○ by combining homologous chromosomes.
○ through the separation of homologous chromosomes.

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Explanation:

Meiosis reduces chromosome number by half when homologous chromosome pairs separate during anaphase I, moving to opposite poles. Crossing over (prophase I) only exchanges genetic material, not changing chromosome count. Combining homologous chromosomes would increase or keep count the same, not reduce it.

Answer:

through the separation of homologous chromosomes.