Why is the usual non-inheritance of acquired traits important for understanding evolution?
Answer and explanation
Correct answer: Because evolution requires heritable changes that pass to the next generation through gametes
Evolution requires heritable variation: a change must affect genetic information in cells that contribute to reproduction and then be passed to descendants. Acquired traits, such as stronger muscles from exercise, usually affect somatic cells and do not alter the DNA of gametes. They therefore are not directly inherited. Option A states the essential condition; B and D support an incorrect idea, while C says acquired traits always change chromosomes, which is false.
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What is the correct answer to this question?
Because evolution requires heritable changes that pass to the next generation through gametes
Why is this the correct answer?
Evolution requires heritable variation: a change must affect genetic information in cells that contribute to reproduction and then be passed to descendants. Acquired traits, such as stronger muscles from exercise, usually affect somatic cells and do not alter the DNA of gametes. They therefore are not directly inherited. Option A states the essential condition; B and D support an incorrect idea, while C says acquired traits always change chromosomes, which is false.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Evolution and speciation.
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