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?
a. 11.1 map units
b. 15.0 map units
c. 2.0 map units
d. 14.8 map units
e. 13.1 map units
ANSWER: c
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a. vitamin D b. vitamin E c. vitamin C d. vitamin A e. vitamin B12
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