autopolyploid


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au·to·pol·y·ploid

(aw'tō-pol'i-ployd),
An autoploid having two or more multiples of the haploid sets of chromosomes.

autopolyploid

(ô′tō-pŏl′ə-ploid′)
adj.
Having more than two sets of chromosomes all derived from the same species.
n.
An organism having more than two sets of chromosomes, all of which were derived from the same species.

au′to·pol′y·ploi′dy n.

autopolyploid

[ô′tōpol′iploid]
Etymology: Gk, autos + polyploos, many times, eidos form
1 an individual, organism, strain, or cell that has more than two genetically identical or nearly identical sets of chromosomes that are derived from the same ancestral species. They result from the duplication of the haploid chromosome set and are referred to as autotriploid, autotetraploid, autopentaploid, autohexaploid, and so on, depending on the number of multiples of the haploid chromosomes they contain. Also called autopolyploidic. autopolyploidy, n.
2 pertaining to such an individual, organism, strain, or cell. Compare allopolyploid. See also allodiploid.
Autopolyploidclick for a larger image
Fig. 57 Autopolyploid . Types of autopolyploid compared with normal diploid.

autopolyploid

a type of POLYPLOID in which there has been duplication of the number of each chromosome, all chromosomes coming from the same original species. For example, in Fig. 57, A represents one complete set of chromosomes. Like an ALLOPOLYPLOID, an autopolyploid is a mechanism for creating new species, particularly in plants. Allopolyploids are more successful, perhaps because autopolyploid chromosomes have pairing difficulties at MEIOSIS.
References in periodicals archive ?
These species or their ancestors probably originated as allopolyploids, rather than as autopolyploids (Heaslip, 1951).