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How does crossing-over increase variation in genes?

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Crossing over "mixing up" the alleles so you have more varied options.
User Sifar
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Answer:

Formation of a dihybrid

Step-by-step explanation:

  • As the crossing over the genetic make involves the two types of the genetic cells the genetic variation takes place as a result of the two genes that get exchanges and thus is one of the final phases of the genetic recombination. And it usually occurs as the matching chromosomes break the then reconnect to form the new chromosome and hence occurs at the prophase of the meiosis.
User Munjal
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