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A large family has members with a hereditary disorder. When a geneticist sketches a pedigree of that family, she notices that the genetic disorder occurs at an earlier age in successive generations.

Suggest a hypothesis that can explain this observation.

A

This occurrence is due to genomic anticipation.

B

This occurrence is due to non-disjunction, and it can be contributed either by the mother or the father.

C

This occurrence is due to genetic imprinting.

D

This occurrence is due solely to the change in diets.

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