Which of the following best describes crossing over? Choose 1 answer: Choose 1 answer: (Choice A) Crossing over is the process by which male and female gametes exchange chromosomes during fertilization. A Crossing over is the process by which male and female gametes exchange chromosomes during fertilization. (Choice B) Crossing over is the process by which paired homologous chromosomes swap sections during meiosis. B Crossing over is the process by which paired homologous chromosomes swap sections during meiosis. (Choice C) Crossing over is the process by which sister chromatids exchange segments with each other during meiosis. C Crossing over is the process by which sister chromatids exchange segments with each other during meiosis.