Question

Read the following statements carefully regarding scientists and their contributions in genetics.
• [(P)] Mendel proposed the law of segregation.
• [(Q)] Sutton and Boveri proposed chromosomal theory of inheritance.
• [(R)] T.H. Morgan experimentally proved linkage in Drosophila.
• [(S)] Hershey and Chase proved that proteins are genetic material. Choose the correct option.

• A. P, Q and R are correct but S is incorrect
• B. P and R are correct but Q and S are incorrect
• C. Only P and Q are correct
• D. All statements are correct

Hint:

Important discoveries:
• Mendel \(\rightarrow\) laws of inheritance
• Sutton and Boveri \(\rightarrow\) chromosomal theory
• Morgan \(\rightarrow\) linkage
• Hershey and Chase \(\rightarrow\) DNA as genetic material

Answer 1

The Correct Option is A

Concept: The development of genetics involved contributions from several important scientists. Understanding the discoveries associated with each scientist is extremely important in modern biology.

Step 1: Analyzing statement P. Mendel proposed:
• law of segregation
• law of independent assortment Hence statement P is correct.

Step 2: Analyzing statement Q. Sutton and Boveri proposed: \[ \boxed{\text{Chromosomal theory of inheritance}} \] Thus statement Q is correct.

Step 3: Analyzing statement R. Morgan worked on: \[ \textit{Drosophila melanogaster} \] and experimentally demonstrated linkage and recombination. Thus statement R is correct.

Step 4: Analyzing statement S. Hershey and Chase demonstrated that: \[ \boxed{\text{DNA is the genetic material}} \] not proteins. Hence statement S is incorrect. Final conclusion. Statements P, Q and R are correct while S is incorrect. Hence option (A) is correct. Final Answer: \[ \boxed{(A)} \]