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Graphical representation of 1-4 chromosome sets , based on 3 chromosomes .

Under Tetraploidy refers to a special form of polyploidy , in which the cells of tissues or part of a complete individual four complete sets of chromosomes have.


Tetraploidy occurs more frequently in plants or is specifically brought about by breeding methods in cultivated plants to increase yield. For example, tetraploid rye is known.

Among the animals, the salmon fish or red viscacha rat are tetraploid. Tetraploidy is also known in human body cells: A small proportion of the liver cells are naturally tetraploid, so such a cell contains 92 instead of 46 chromosomes as in the usual diploid cell.

Individual evidence

  1. Sengbusch, R. v. (1941). Polyploid crops (rye, oats, stubble turnips, turnips and radishes) . Der Züchter (Journal of Theoretical and Applied Genetics), 13 (6), 132-134
  2. ^ Rolf Knippers, Molecular Genetics, 9th edition, page 166