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.

Question

Quizplus · Accepted Answer

Double crossover events can create a result that looks like no crossover or only one crossover occurred in a two gene mapping experiment if the genes are far apart on a chromosome. This can lead to inaccurate mapping results. However, if the genes are close together, the chance of such an event occurring is reduced and mapping becomes more accurate.

Which of the Following Best Describes Why Mapping Is Most