Given below are two statements:

Statement I: Failure of segregation of chromatids during cell cycle, resultin

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 resulting in the gain or loss of chromosome is called polyploidy.

In the light of the above statements, choose the correct answer from the options given below:

Accepted Answer

:
- Statement I is False: Failure of segregation of chromatids during the cell division cycle results in the gain or loss of a chromosome(s) (not a whole set), and this is called aneuploidy (e.g., Down's syndrome) . Gain of a whole set is polyploidy.
- Statement II is False: Failure of cytokinesis after the telophase stage of cell division results in an increase in a whole set of chromosomes, and this phenomenon is known as polyploidy . The statement incorrectly describes it as 'gain or loss of chromosome' (singular) and attributes it to anaphase.

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