Abstract
Study of karyotypes has been revealing important information on the taxonomic relationships and evolutionary patterns in various groups of birds. Karyotypes analysis and morphometric measurement of the chromosomes of three birds species of Geopelia cuneata (Columbiformes), Oriolus oriolus and Corvus ruficollis (Passeriformes) and their karyological have been studied. The diploid chromosome numbers of three species were, 2n=72, 2n=80 and 2n =80 respectively. The karyotypes of three species were different. The somatic and sex chromosomes and karyotypes of three species discussed and compared with other related species in the present study.
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