Structure, Localization, and Stability of Chromosomes in Karyotype Evolution in Lizards of the Lacertidae Family

Larissa A. Kupriyanova

Abstract


The chromosomes of eight lacertid species were studied by standard and banding techniques (C- and NOR-banding, telomeric sequences) and chromosomal interlocation during mitosis and meiosis was investigated. The data obtained are discussed in the light of modern ideas of the interrelation between DNA changes, karyotype evolution, and speciation. The assumption is voiced on the optimal number of arms and, consequently, the “optimal” number of functional telomeres in the Lacertidae, which in its turn may be associated with the structure of the nucleus and with canalization of the genome as a whole.


Keywords


Lacertidae; karyotype; chromosome; evolution

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References


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