during meiosis, a process known as crossing over occurs. which of the following is true of crossing over? choose 1 answer: choose 1 answer: (choice a) a crossing over occurs more often in male gametes than female gametes. (choice b) b a chiasma indicates that a crossover has occurred. (choice c) c segments of dna are traded between unrelated chromosomes. (choice d) d most homologue pairs do not have any crossover events