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6. Lane 1 & 14 are called a standards. What do you notice about
the bands produced by the standard?
7. A standard consists of DNA fragments that scientists KNOW
the lengths of. Why is it important to have a standard?
8. Did all of these samples come from the same DNA source?
How do you know?
9. Look at the DNA 'fingerprints'. Did ANY of the samples
come from the same individual? *
How do you know? **
10. Name two situations when DNA fingerprints are useful. **
11. How does the DNA migrate from one end of the gel to the other? * *
12. What cuts up the DNA into tiny fragments? **

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