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MDCAT Biology QUESTION #7744
Question 1

What is the primary outcome of crossing over during prophase I of meiosis?

  • DNA duplication without exchange
  • Homologous chromosomes exchange segments producing recombinant chromatids✔️
  • Identical parts exchanged no variation
  • Non-homologous exchange
Correct Answer Explanation

Crossing over exchanges genetic material between non-sister chromatids of homologous chromosomes, producing new allele combinations (recombination) and increasing genetic variation.