No, not all uses of DNA technology involve gene transfer. For example,
one common techniques uses DNA patterns to speed up breeding plants, animals or microbes.
These DNA patterns - DNA "fingerprints" - are like the bar codes found on packages in the supermarket.
Just as each item has its own bar code pattern so the computer can "read" its price, some genetic
traits have their own DNA pattern. Breeders can use these patterns to find and select breeding stock
with traits such as disease resistance.
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