Q418
Most commonly used chemical agent for doubling of plant chromosome is
A.
Nitrous oxide
B.
Colchicine
AnswerC.
EMS
D.
Sulphur di oxide
Answer: Option B
Solution
Answer: Option B
Solution:
The most commonly used chemical agent for doubling plant chromosomes is Colchicine.It disrupts mitosis by inhibiting the formation of spindle fibers and disturbing normal polar chromosomal migration, resulting in chromosome doubling.
Chromosome doubling occurs as a spontaneous process of mitotic cell division without cytokinesis.