tetraploid
/ˈtɛtrəplɔɪd
/Biology
adjective
1(Of a cell or nucleus) containing four homologous sets of chromosomes: additional chromosomes were introduced into the tetraploid cells...
- Our studies on isogenic diploid and tetraploid cells show that tetraploids have increased chromosome instability during exponential growth.
- Abnormal diploid, triploid and tetraploid nuclei with separated dual color signals were clearly distinguishable from normal nuclei.
- Compared to their diploid counterparts, which have a normal set of chromosomes, tetraploid cells were more prone to generate tumors in mice, and these tumors showed genomic instability similar to many human cancers.
1.1(Of an organism or species) composed of tetraploid cells: a tetraploid species of hybrid origin...
- In terms of economics, the polyploid AD genome is by far the most important as > 90% of the world's cotton fibre is produced by G. hirsutum and G. barbadense, two of the tetraploid species.
- The diploid and hexaploid species are distributed in Asia and Africa, while the tetraploid species inhabit Africa and mainly the Palearctic area including Europe, North Africa, and western Asia.
- The derivation of our model centers on tetraploid species in which multivalent pairing is only one mechanism for chromosomal pairings during meioses.
noun
An organism, variety, or species composed of or featuring tetraploid cells: a tetraploid which produces flowers of double size...
- Our studies on isogenic diploid and tetraploid cells show that tetraploids have increased chromosome instability during exponential growth.
- Then somewhere - no one knows where - the tetraploids crossed with another species of wild grass to produce the bread wheats from which we make leavened bread today.
- The populations showed continuous morphological variation connecting the species, but karyotypically they consisted of only three types of plants: diploids, triploids, and tetraploids.
Derivatives
tetraploidy
- However, in our study we found one case each of triploidy and of tetraploidy.
- Therefore, these authors suggested diploidy for sturgeon with 120 chromosomes and tetraploidy for sturgeon with 250 chromosomes.
- The result of increased inbreeding and an associated fitness decline in long-term small populations stands in contrast to theoretical predictions about inbreeding in connection with incompatibility and tetraploidy.