Explain why the genetic content of individual chromosomes in a spermatozoon most likely differs from the genetic content of individual chromosomes in a primary spermatocyte.

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This question asks for the "most likely" reason for why the individual chromosomes present in a spermatozoan at the end of meiosis are different than the individual chromosomes that were present at the start of meiosis. The most likely reason for the genetic changes is due to a process called "crossing over." Crossing over occurs when sections of homologous chromosomes exchange places with each other. This happens at the start of meiosis when...

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