Isabelle was born with Down syndrome.Her parents have provided her with a stimulating and enriching learning environment.Even though she has achieved a higher level of intellectual functioning than other Down syndrome individuals,she will never be as intelligent as her peers with normal chromosomal structure.This observation is consistent with the concept of

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Quizplus · Accepted Answer

The concept of range of reaction states that genetic makeup establishes boundaries or limits within which environmental factors may influence development. This means that even with a stimulating and enriching learning environment, Isabelle's intellectual functioning will be limited due to her genetic makeup.

Isabelle Was Born with Down Syndrome