Question

Presence of whole sets of chromosomes in an organism are indicated by the following EXCEPT ..............

• A. diploidy
• B. aneuploidy
• C. triploidy
• D. polyploidy

Hint:

Aneuploidy leads to conditions like Down syndrome, where there is an extra chromosome in the genome.

Answer 1

The Correct Option is B

Step 1: Understanding the terms.
- Diploidy refers to the presence of two sets of chromosomes.
- Aneuploidy is the condition of having an abnormal number of chromosomes, not complete sets.
- Triploidy refers to three sets of chromosomes.
- Polyploidy refers to having more than two sets of chromosomes.
Step 2: Analyzing the options.
(A) diploidy: Correct, diploidy represents two full sets of chromosomes.
(B) aneuploidy: Incorrect, aneuploidy involves an abnormal number of chromosomes, not full sets.
(C) triploidy: Correct, triploidy is a condition where an organism has three sets of chromosomes.
(D) polyploidy: Correct, polyploidy is the condition of having more than two complete sets of chromosomes.
Step 3: Conclusion.
The correct answer is (B) aneuploidy, as it refers to an abnormal number of chromosomes, not complete sets.