Question

Match Column I with Column II and find the correct answer :

Column I		Column II
1.	Aneuploidy	p.	Increase in whole set of chromosomes
2.	Monoploidy	q.	Loss or gain of a chromosome
3.	Polyploidy	r.	Two sets of chromosomes
4.	Diploidy	s.	A single set of chromosomes

• A. 1-p, 2-q, 3-r, 4-s
• B. 1-r, 2-p, 3-q, 4-s
• C. 1-q, 2-s, 3-p, 4-r
• D. 1-s, 2-r, 3-p, 4-q

Answer 1

The Correct Option is C

To correctly match the terms in Column I with their definitions in Column II: 

• Aneuploidy: This refers to the loss or gain of individual chromosomes, leading to an abnormal chromosome number.
• Monoploidy: This condition is characterized by having a single set of chromosomes (haploid), which is common in certain organisms like male bees.​
• Polyploidy: This involves an increase in the entire set of chromosomes, resulting in multiple sets beyond the diploid number.​
• Diploidy: This denotes having two sets of chromosomes, which is the standard chromosome number in most somatic cells of animals and plants.​

Thus, the correct matching is:​

Aneuploidy → q. Loss or gain of a chromosome
Monoploidy → s. A single set of chromosomes
Polyploidy → p. Increase in whole set of chromosomes
Diploidy → r. Two sets of chromosomes

Therefore, the correct answer is (C) : 1-q, 2-s, 3-p, 4-r.

Answer 2

Let's analyze each term in Column I and find its corresponding definition in Column II:

• 1. Aneuploidy: This term describes a condition where the chromosome number is abnormal due to the loss or gain of one or more individual chromosomes, not an entire set. Examples include trisomy (2n+1) or monosomy (2n-1). This matches description q.
• 2. Monoploidy: This term refers to the state of having only a single set of chromosomes (n). This is also referred to as haploidy in some contexts, but monoploidy specifically emphasizes a single set-in organisms that are normally diploid or polyploid. This matches description s.
• 3. Polyploidy: This term describes the condition where an organism possesses more than two complete sets of chromosomes (e.g., 3n, 4n, 6n). This represents an increase in the whole set of chromosomes. This matches description p.
• 4. Diploidy: This term describes the condition of having two sets of chromosomes (2n), one set inherited from each parent. This is the normal condition for most animals and many plants. This matches description r.

So, the correct matching is:

• 1 → q
• 2 → s
• 3 → p
• 4 → r

Comparing this with the given options:

• 1-p, 2-q, 3-r, 4-s
• 1-r, 2-p, 3-q, 4-s
• 1-q, 2-s, 3-p, 4-r
• 1-s, 2-r, 3-p, 4-q

The correct option is 1-q, 2-s, 3-p, 4-r.