If you compared two samples of DNA at three different locations in the genome and found they had different lengths of short tandem repeats at each location,what could you conclude?

Question

Quizplus · Accepted Answer

Short tandem repeats (STRs) are regions of DNA that contain repeating sequences of base pairs. The length of each repeat can vary between individuals, making STR analysis a useful tool for identifying genetic differences between individuals. If two samples have different lengths of STRs at multiple locations in the genome, it is highly likely that they came from different individuals. Therefore, the correct answer is A. It is not possible to determine the sex of the individuals from STR analysis alone, so choices C and D are incorrect. Choice B is also incorrect because if two samples came from the same individual, they would have the same lengths of STRs at each location in the genome.

If You Compared Two Samples of DNA at Three Different