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polyploidy
Sign in to saveAlso known as polyploid
thumb|This image shows haploid (single), diploid (double), triploid (triple), and tetraploid (quadruple) sets of chromosomes. Triploid and tetraploid chromosomes are examples of polyploidy.
Research
15,374 papers- Polyploidy in urban environments.Trends in ecology & evolution · 2022
- Polyploidy before and after domestication of crop species.Current opinion in plant biology · 2022
- Polyploidy and mTOR signaling: a possible molecular link.Cell communication and signaling : CCS · 2024
- Polyploidy in liver development, homeostasis and disease.Nature reviews. Gastroenterology & hepatology · 2020
- Polyploidy in Tissue Repair and Regeneration.Cold Spring Harbor perspectives in biology · 2021
via PubMed
~30 min read
Article
30 sectionsContents
- Terminology
- Types
- Classification
- Autopolyploidy
- Allopolyploidy
- Aneuploid
- Endopolyploidy
- Monoploid
- Temporal terms
- Neopolyploidy
- Mesopolyploidy
- Paleopolyploidy
- Other similar terms
- Karyotype
- Homoeologous chromosomes
- Examples
- Humans
- Fish
- Other animals
- Plants
- Crops
- Examples
- Fungi
- Chromalveolata
- Bacteria
- Archaea
- See also
- References
- Further reading
- External links
thumb|This image shows haploid (single), diploid (double), triploid (triple), and tetraploid (quadruple) sets of chromosomes. Triploid and tetraploid chromosomes are examples of polyploidy.
Polyploidy is a condition in which the cells of an organism have more than two paired sets of (homologous) chromosomes. Most species whose cells have nuclei (eukaryotes) are diploid, meaning they have two complete sets of chromosomes, one from each of two parents; each set contains the same number of chromosomes, and the chromosomes are joined in pairs of homologous chromosomes. However, some organisms are polyploid. Polyploidy is especially common in plants. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Males of bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis; the sporophyte generation is diploid and produces spores by meiosis.