Question

Mendel did not face the problem of linkage, however, seven characters studied by him were located on how many chromosomes?

• A. 7
• B. 4
• C. 5
• D. 3

Hint:

Mendel's pea:
- 7 pairs of chromosomes (2n=14).
- 7 characters on 4 chromosomes.
- No linkage because genes were on different chromosomes.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
This question tests knowledge of linkage and Mendel's experiments.

Step 2: Detailed Explanation:
Mendel studied seven characters in pea (Pisum sativum).
The pea plant has 7 pairs of chromosomes (2n = 14, n = 7).
However, the seven characters studied by Mendel were located on only 4 chromosomes.
The genes for the seven traits were on four different chromosomes, so they were not linked.
Thus, Mendel did not face the problem of linkage.
Option A (7) is the number of chromosomes, not the number on which the genes are located.
Option C (5) and D (3) are incorrect.

Step 3: Final Answer:
Thus, the seven characters were located on 4 chromosomes, which corresponds to option (B).
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