Polyploidy is a condition in which an organism cotains more than twice the haploid number of chromosomes. It is extremely common in plants, but for animals it is less common. Most cases for animals polyploidy is found in insects,amphibians, reptiles and fish like the pictured above. There is only one known case in mammals, it is a rat.
Polyploidy. (2011, March 3). Retrieved from users.rcn.com/./Polyploidy.html
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