Are bananas and some citrus fruits polyploid?

Yes, bananas and some citrus fruits are polyploid. Polyploidy is a condition in which an organism has more than two complete sets of chromosomes. Bananas are triploid, meaning they have three sets of chromosomes, and some citrus fruits, such as oranges and grapefruits, are tetraploid, meaning they have four sets of chromosomes. Polyploidy is relatively common in plants and can be induced artificially by treating plants with chemicals that disrupt chromosome segregation during cell division. Polyploidy can lead to several changes in plant characteristics, such as increased size, vigor, and resistance to pests and diseases.