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What is meant by the size of an allele in the PCR gel if each PCR...

What is meant by the size of an allele in the PCR gel if each PCR band represents an Allele?

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The alleles are giving bands in gel electrophoresis. The separation is on the basis of charge and size only. The larger the size, the less movement of the allele in the gel. In gel electrophoresis, we use ladder of our known size and we use ladder in one of the well. The bands on ladder at particular position shows the size of the relative bands. The ladder size generally starts from 100 bp to 3000 bp and it varies depending upon the size of the alleles. So here we can see the relative size of the allele with respect to ladder.

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