BIO NMDCAT Lamarckism

nmdcat.online July 14, 2026

Which of the following scientific discoveries most directly supported the chromosomal basis of inheritance, dealing a fatal blow to Lamarckism?

A. Pasteur's experiments on sterilization

B. Thomas Hunt Morgan's work on Drosophila melanogaster showing genes lie on chromosomes

✓

C. Hooke's discovery of the cell wall

D. Oparin's hypothesis of chemical evolution

📝 Explanation

Morgan's work proved that hereditary traits are carried on chromosomes inside the cell nucleus, which are not altered by the somatic activities or "urges" of the animal.

📖 Additional Information

Pasteur's experiments on sterilization
Thomas Hunt Morgan's work on Drosophila melanogaster showing genes lie on chromosomes
Hooke's discovery of the cell wall
Oparin's hypothesis of chemical evolution

Morgan's work proved that hereditary traits are carried on chromosomes inside the cell nucleus, which are not altered by the somatic activities or "urges" of the animal.

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