Final answer:
A crossover event in one region of the chromosome may reduce the probability of crossover events in nearby regions.
Step-by-step explanation:
True. A crossover event in one region of the chromosome may reduce the probability of crossover events in nearby regions.
During crossover, genetic material is exchanged between homologous chromosomes, leading to the production of recombinant chromatids with new combinations of genes. The likelihood of a crossover event occurring between two genes decreases as the distance between them on the chromosome decreases.