Plant breeding this chromosomal aberration is perfectly viable, but often produce sterile plants. Many cultivated plants are polyploid (triploid, tetraploid, hexaploid, etc. ..), since its polyploidy them very effective and produce much larger fruits and tasty. An example is the bread wheat, Triticum aestivum, a hexaploid product of a spontaneous hybridization took place some 2,000 years ago, the grains are much larger than those of wild wheat. The giant strawberries and tomatoes are also polyploid.
In animal and human genetics are also produced chromosomal aberrations polyploidy complete, but the embryos are not viable and die producing a spontaneous abortion. Sometimes the only surviving trisomies (Down syndrome, Edwards, Patau, Klinefelter, etc ...) and haploidy (Turner syndrome) in a single chromosome, but never complete polyploid.
In tropical countries, cultivated the call male plantain, Musa x paradisiaca, which produces large banana takes seedless pulp, unfit to be eaten fresh, but of excellent flavor when fried or baked. The plantain is a natural hybrid between Musa acuminata and Musa balbisiana.
In frost-free Mediterranean climates is grown the called garden banana, Musa x Orinoco, a hybrid able to withstand the cold winters of the coastal areas of the Mediterranean basin, where it rarely reaches freezing.
Ideally, the Musa x Orinoco is 4 meters high. To withstand the long, dry and hot summers of the Mediterranean requires abundant irrigation weekly. In winter, cold and wind burn their leaves, but when temperatures rise again in April re-sprout new leaves and blooms in midsummer with a small cluster of red flowers.
Hermaphrodite flowers of banana garden with five stamens and a pistil. (Photograph taken in a garden of Sa Pobla on Mallorca)