If a mutated region on chromosome 15 is inherited from the father, the child will have Prader-Willi syndrome; however, if the same mutated region is inherited from the mother, the child will have Angelman syndrome. This is an example of:

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This is an example of epigenetic inheritance because the expression of the syndrome depends on whether the mutation is inherited from the mother or the father, illustrating a phenomenon known as genomic imprinting, which is a type of epigenetic modification that leads to the differential expression of a gene or chromosome region depending on the parent of origin.

If a Mutated Region on Chromosome 15 Is Inherited from the Father