Which of the Following Best Describes Why Mapping Is Most

Multiple Choice

Which of the following best describes why mapping is most accurate when genes are close together on a chromosome?

A) This is not true; mapping genes is most accurate when genes are far away from each other.
B) Double crossover events yield a result that looks the same as no crossover in a two gene mapping experiment and this throws off the calculations.
C) The centromere gets in the way.
D) This is not true; relative distance of two loci on a chromosome has no effect on accuracy of mapping.
E) Double crossover events yield a result that looks the same as one crossover in a two gene mapping experiment and this throws off the calculations.