duplication of chromosomes

du·pli·ca·tion of chro·mo·somes

a chromosome aberration resulting from unequal crossing over or exchange of segments between two homologous chromosomes; one chromosome of the pair loses a small segment, whereas the other gains this segment; the chromosome gaining the segment has undergone duplication whereas its homologue has undergone deletion. See: hemoglobin Lepore.

du·pli·ca·tion of chro·mo·somes

(dū'pli-kā'shŭn krō'mŏ-sōmz)
A chromosome aberration resulting from unequal crossing over or exchange of segments between two homologous chromosomes; one chromosome of the pair loses a small segment, while the other gains this segment; the chromosome gaining the segment has undergone duplication whereas its homologue has undergone deletion.
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References in periodicals archive ?
Duplication of chromosomes from potato wild species canbe obtainedby treatment of their somatic tissues (leaves, stem segments, meristems, and mini tubercles) (CHAUVIN et al., 2003; QUESENBERRY et al., 2010) with antimitotic substances such as colchicine and oryzalin (HANNEMAN, 1999).
Colchicine and oryzalin effects on tetraploid induction and leaf anatomy of Solanum commersonii ssp/Colchicina e orizalina na inducao de tetraploides e na anatomia foliar de Solanum commersonii ssp
Whereas chromosome number change in most angiosperms proceeds by duplication of chromosomes, chromosome number changes in Carex are primarily by fission and fusion (Wahl, 1940; Davies, 1956; Hoshino, 1981).
The evolution of chromosome arrangements in Carex (Cyperaceae)
"That starts the duplication of chromosomes, making two copies of everything."
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