Concept
Version 7
Created by Boundless
Whole-Genome Duplication

Polyploidy
This image shows haploid (single), diploid (double), triploid (triple), and tetraploid (quadruple) sets of chromosomes. Triploid and tetraploid chromosomes are examples of polyploidy.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Haploid, diploid ,triploid and tetraploid."
http://en.wikipedia.org/wiki/File:Haploid,_diploid_,triploid_and_tetraploid.svg
Wikipedia
CC BY-SA.