Adeletion of a small region on the long arm of chromosome 15 causes a developmental disorder in children called prader–willi syndrome when the deletion is inherited from the father. however, the deletion of this same region of chromosome 15 can also be inherited from the mother, but this inheritance results in a completely different set of symptoms, called angelman syndrome. what type of genetic phenomenon does this represent?

Genomic imprinting.

Explanation:

Genomic imprinting may be defined as the epigenetic phenomena that shows the different expression of the gene depending on the parent origin. The genomic imprinting has been found in plants, fungi and animal.

The deletion from the father chromosome results in Prader–Willi syndrome. The deletion of chromosome from mother results in Angelman syndrome. Here, the expression of the genes depend on the whether it has been inherited from the father and mother.

Thus, the answer is genomic imprinting.

the correct answer is d