Enzymes would cut in a taster and there would be no cut in a non-taster.
How enzymes cut in a taster and non-taster?
For the enzyme cut in a Taster:
For an heterozygous taster, only half of one's DNA will be cut by the enzyme. Hence, fragments which are produced on the gel at 221bp, 177bp and 44bp.
For the hom-ozygous taster, both copies of the gene contain the polymorphism, hence, allowing to be cut by the enzyme. Fragments of 177-bp and 44-bp are then produced.
For the enzyme cut in a Non-taster: There is no cut in Non-tasters. This is due to the fact that no allele contains the polymorphism.
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