- polyploids
- 'pɑlɪplɔɪd /'pɒl- n. cell that has three or more times the usual number of chromosomes (Biology) adj. (Biology) containing three or more times the normal number of chromosomes (about cells)
English contemporary dictionary. 2014.
polyploids
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Polyploid — This image shows haploid (single), diploid (double), triploid (triple), and tetraploid (quadruple) sets of chromosomes. Triploid and tetraploid chromosomes are examples of polyploidy. Polyploid is a term used to describe cells and organisms… … Wikipedia
Polyploidy — occurs in cells and organisms when there are more than two homologous sets of chromosomes.Most organisms are normally diploid; polyploidy may occur due to abnormal cell division. It is most commonly found in plants. Haploidy may also occur as a… … Wikipedia
G. Ledyard Stebbins — Infobox Person name=G. Ledyard Stebbins caption= birth date=birth date|1906|1|6|mf=y birth place=Lawrence, New York dead=dead death date=death date and age|2000|1|19|1906|1|6|mf=y death place=Davis, CaliforniaGeorge Ledyard Stebbins, Jr. (January … Wikipedia
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evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… … Universalium
heredity — /heuh red i tee/, n., pl. heredities. Biol. 1. the transmission of genetic characters from parents to offspring: it is dependent upon the segregation and recombination of genes during meiosis and fertilization and results in the genesis of a new… … Universalium
Microevolution — Part of a series on Evolutionary Biology … Wikipedia
Paleopolyploidy — right|thumb|280px|Overview of Paleopolyploidy Process. Many higher eukaryotes were paleopolyploids at some point during their evolutionary history.Paleopolyploidy refers to ancient genome duplications which occurred at least several million years … Wikipedia
fern — fernless, adj. fernlike, adj. /ferrn/, n. any seedless, nonflowering vascular plant of the class Filicinae, of tropical to temperate regions, characterized by true roots produced from a rhizome, triangular fronds that uncoil upward and have a… … Universalium
Fern — /ferrn/, n. a female given name. * * * Any of about 10,000–12,000 species (division Filicophyta) of nonflowering vascular plants that have true roots, stems, and complex leaves and reproduce by spores. Though ferns were once classified with the… … Universalium
