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Sholpan [36]
3 years ago
13

ANSWER AND I WILL GIVE BRAINLIEST AND POINTS!

Biology
1 answer:
ehidna [41]3 years ago
8 0

Answer:

A DNA marker

Explanation:

also known as a size standard or a DNA ladder) is loaded into the first well of the gel. The fragments in the marker are of a known length so can be used to help approximate the size of the fragments in the samples.

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