Various species of the flowering plant of the genus Chrysanthemum have 18, 36, 54, 72, and 90 chromosomes. The variation is likely due to polyploidy.
Polyploidy can be defined as the number of complete sets of chromosomes in a given cell of an organism.
A diploid organism contains two complete sets of homo-logous chromosomes in its somatic cells.
Many organisms used polyploidy as an evolutionary strategy for adaptation to challenging environmental conditions.
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