Biology / Bio 1327 · Atom · ~20 seconds
"Traits Acquired in Life Are Inherited"
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An organism's acquired traits, such as a strengthened muscle, do not alter its DNA and are not passed to offspring, though epigenetic marks can carry across generations.
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A weightlifter's enlarged muscles arise from cellular responses in muscle tissue, with no path back into gametes' DNA.
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Epigenetic inheritance is a genuine, studied exception at the expression level, not a Lamarckian sequence-inheritance reopening.