Reason (R): Heredity and environment interact in their effects on development.
Choose the correct option:
Answer & Solution
Correct option is A
The correct answer is (a) Both (A) and (R) are true and (R) is the correct explanation of (A).
Explanation:
Development is a result of the Nature vs. Nurture interaction. While heredity sets the potential for height (A), the environment (nutrition/exercise) determines whether that potential is fully realized. Thus, the general principle of interaction (R) perfectly explains the specific physical example provided in the assertion.
Information Booster:
Assertion:
⇨ Genetic Blueprint: Genes provide the biological instructions for traits like body structure and skin tone.
⇨ Environmental Triggers: Factors like dietary intake can activate or inhibit certain growth-related genes.
⇨ Epigenetics: The study of how behaviors and environment can cause changes that affect how genes work.
⇨ Physical Plasticity: The body's ability to adapt physically to external conditions like rigorous athletic training.
⇨ Range of Reaction: The concept that genes set a limit, but environment decides the exact point within that range.
Reason:
⇨ Co-action: Nature and nurture do not act independently; they are constantly influencing each other.
⇨ Developmental Formula: Development = Heredity × Environment (not just addition).
⇨ Dynamic Process: As the environment changes, the expression of heredity can also shift over a lifetime.
⇨ Individual Differences: Variation among children is caused by the unique combination of their DNA and surroundings.
⇨ Holistic Growth: To optimize a child's growth, one must provide a nutritious environment regardless of genetic traits.