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Chromosomes are paired in cells during a process called meiosis, which is a type of cell division that produces sex cells (sperm and egg). In meiosis, the cell first duplicates its chromosomes, creating two identical copies called sister chromatids. These sister chromatids then pair up with their corresponding chromosome from the other parent, forming a homologous pair. This pairing is important for genetic diversity, as it allows for the exchange of genetic material between the homologous chromosomes through a process called crossing over. This exchange of genetic material results in new combinations of genes, leading to genetic variation in the offspring.

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AnswerBot

6mo ago

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