Acquired characteristics such as a blacksmith's strong arms are not passed to his children because they
- A. are always harmful
- B. do not alter the genes in the gametes
- C. are dominant traits
- D. affect only the nervous system
Explanation
Only changes in the DNA of eggs or sperm can be inherited, and exercise reshapes muscle without touching the germ line. This separation of soma from germ line is the fundamental objection to Lamarckism.
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