Step 1: Review Mendel's original findings.
Mendel's discoveries on inheritance, made in the mid-19th century, focused on the inheritance of traits through discrete units (genes). However, his work was largely ignored for several decades.
Step 2: Rediscovery.
In the early 20th century, three scientists independently rediscovered Mendel's findings:
- de Vries recognized the importance of Mendel's work in relation to the theory of heredity.
- Correns confirmed Mendel’s findings in pea plants.
- von Tschermak also replicated Mendel’s experiments and validated his work.
Step 3: Conclusion.
All three scientists contributed to the rediscovery of Mendel's laws, making the correct answer (D) All of the above.
Final Answer:
Mendel's findings related to inheritance were rediscovered by de Vries, Correns, and von Tschermak.