Question

Given below are two statements:
Statement I: Failure of segregation of chromatids during cell cycle resulting in the gain or loss of whole set of chromosome in an organism is known as aneuploidy.
Statement II: Failure of cytokinesis after anaphase stage of cell division results in the gain or loss of a chromosome is called polyploidy.
In the light of the above statements, choose the correct answer from the options given below:

• A. Statement I is true but Statement II is false
• B. Statement I is false but Statement II is true
• C. Both Statement I and Statement II are true
• D. Both Statement I and Statement II are false

Answer 1

The Correct Option is D

Statement I is incorrect. Aneuploidy is the gain or loss of one or a few chromosomes, not a whole set. Polyploidy is the gain of a whole set of chromosomes.
Statement II is also incorrect. Failure of cytokinesis after anaphase leads to polyploidy (a change in the number of chromosome sets), not aneuploidy (a change in the number of individual chromosomes within a set).