As an undergraduate research assistant, you are given a genetic mapping project. You are told that genes a and b are 7.4 map units from each other and that genes b and c are 5.7 map units from each other. You perform a testcross to determine the map distance between a and c . Which of the following results would indicate that c lies between a and b ?

Question

Quizplus · Accepted Answer

If gene c lies between a and b, the distance between a and c would be less than the sum of the distances from a to b and b to c, which is 7.4 + 5.7 = 13.1 map units. A distance of 2.0 map units indicates that c is indeed between a and b, as it is significantly less than the sum of the distances between a and b and b and c.

As an Undergraduate Research Assistant, You Are Given a Genetic