2023 Manipur Principles of Inheritance and VariationInduction of polyploidy Medium Question 32 of 198 in Principles of Inheritance and Variation

Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after:

A Anaphase
B Telophase
C Prophase
D Metaphase

The answer is D.

Solution

Disrupting mitotic cell division soon after metaphase (e.g. by preventing spindle formation with colchicine) prevents chromosome separation and cytokinesis, resulting in a cell with a doubled number of chromosomes (polyploidy).

Concept Induction of polyploidy

Principles of Inheritance and Variation in past papers

198 questions from this chapter have appeared across 27 exam years.