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Why do chromosomes occur in pairs?

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Why do genes always occur in pairs? They don't. But most genes in animals and plants do. Why? To reproduce, genes have to be copied, and then the cells divide. When there is only one set of genes, there is no back-up for a faulty one. read more

Chromosomes occur in pairs in diploid organisms like us. I think it gives us the advantage of creating more variations by receiving a pair from each of our parents hence ensuring the survival of our species by creating new adaptations. read more

This is why we are basically a genetic melding of our two parents. When we produce gametes(sperm, egg), one of those chromosomes is passed on to the next generation. This contributes to a wide differentiation in species, important for survival. read more

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