Meiosis differs from mitosis as

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(B) is the correct answer. Meiosis is characterized by the process of crossing over,which occurs during the pachytene stage of prophase-$I$. Crossing

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It shows crossing over

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(B) is the correct answer. Meiosis is characterized by the process of crossing over,which occurs during the pachytene stage of prophase-$I$. Crossing over involves the exchange of genetic material between non-sister chromatids of homologous chromosomes,leading to genetic variation. Meiosis is a reductional division where a diploid $(2n)$ cell divides to form four haploid $(n)$ daughter cells,whereas mitosis is an equational division where the chromosome number remains unchanged.

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