Crossing over happens during which phase of meiosis?
The crossing over involves the exchange of the DNA segments between the homologous chromosomes that will finally end in the formation of recombinant chromosomes as a result of sexual reproduction. Usually crossing over takes place at the pachytene stage of prophase I (meiosis I) that is one of the final phases of genetic recombination. Crossing over helps to produce altered alleles in the homologous chromosome due to the exchange of the DNA between them. Thus, new order of allele possessing gametes can be produced that ultimately leads to genetic diversity of an organism.
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