MHT CET · BIOLOGY · STD 12 - 3. Inheritance and Variation

Match parts of chromosome given in Column I with their explanation in Column II:
Column I
(Chromosome)
Column II
Column II (Explanation)
Q.1. Centromere a. Disc shaped plate where spindle fibres get attached during cell division.
Q.2. Secondary constriction b. Long unbranched slender highly coiled DNA.
Q.3. Kinetochore c. Place where 2-chromatids are joined together.
Q.4. Chromatonema d. Nucleolus gets organised at this place.

Choose the correct answer from the following options.

A 1 - c, 2 - b, 3 - d, 4 - a
B 1 - d, 2 - c, 3 - b, 4 - a
C 1 - c, 2 - d, 3 - a, 4 - b
D 1 - d, 2 - a, 3 - b, 4 - c

Verified Solution

Answer & Solution

Correct Answer

(C) 1 - c, 2 - d, 3 - a, 4 - b

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Column I (Chromosome)	Column II Column II (Explanation)
Q.1. Centromere	a. Disc shaped plate where spindle fibres get attached during cell division.
Q.2. Secondary constriction	b. Long unbranched slender highly coiled DNA.
Q.3. Kinetochore	c. Place where 2-chromatids are joined together.
Q.4. Chromatonema	d. Nucleolus gets organised at this place.