A) colchicine
B) inbreeding
C) line breeding
D) self pollination
Correct Answer: A
Solution :
Polyploidy can be produced artificially by colchicine treatment. Colchicine blocks the spindle formation and thus inhibits the movement of sister chromatids to the opposite pole. the resulting restitution nucleus includes all the chromatids, as a result the chromosome number of cue cell is doubled (ie, polyploidy is produced).
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