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Satellite DNA is a series of tandemly repeated sequences found in the genomes of many organisms; microsatellites are one type of these.

Which of the following statements about microsatellites is NOT correct?


The length of a single repeat in a microsatellite is usually from 2 to 5 bp.


The number of repeats in a microsatellite usually changes by unequal crossing over.


Some mutations in microsatellites can cause phenotypic differences or even disease.


Microsatellites are useful in matching DNA samples to particular individuals because they tend to be highly variable in total length.

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