Question:
Occurrence of an extra chromosome in a diploid set of chromosomes is called ___________.
Occurrence of an extra chromosome in a diploid set of chromosomes is called ___________.
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{2n + 1 = Trisomy}
Updated On: Feb 4, 2026
- monosomy
- polysome
- trisomy
- polyploidy
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The Correct Option is C
Solution and Explanation
Step 1: Understanding chromosome number variations.
A diploid organism normally has two copies of each chromosome (2n).
Step 2: Extra chromosome condition.
When one extra chromosome is added to the diploid set, the condition becomes (2n + 1).
Step 3: Terminology.
This condition is known as trisomy. A common example is Down syndrome (Trisomy 21).
A diploid organism normally has two copies of each chromosome (2n).
Step 2: Extra chromosome condition.
When one extra chromosome is added to the diploid set, the condition becomes (2n + 1).
Step 3: Terminology.
This condition is known as trisomy. A common example is Down syndrome (Trisomy 21).
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