If you have two different strands of DNA that are each 400 base pairs long, and

Question

If you have two different strands of DNA that are each 400 base pairs long, and you run them on a gel in one sample (so they’re loaded in the same well), what will the banding pattern on the gel look like?

-They will appear as one band because they’re the same size.
- There will be two bands very close to each other; one will be able to tell that one band traveled a little further than the other.
-There will be no bands because the two types of DNA must be kept separate or electrophoresis won’t work.

Explanation / Answer

Answer: [They will appear as one band because they're the same size] Gel electrophoresis uses a current to separate the DNA based on size. Since they're both the same size, they will be together.

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