Evolution of karyotypes in snakes View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1972-06

AUTHORS

L. Singh

ABSTRACT

Karyotype analysis and morphometric measurement of the chromosomes of 17 species of snakes have been done. Chromosomes of different species so far worked out in each family have been compared using quantitative methods to derive chromosomal affinities between species of different taxonomic categories. The following conclusions have been drawn: (i) It is suggested that the retention of Xenopeltidae as a separate family is unnecessary and the only species Xenopeltis unicolor referred to in that group should be included in the family Boidae. (ii) The subfamilies, Boinae and Pythoninae cannot be distinguished chromosomally. (iii) On the basis of chromosomal similarities, the cytologically known species of Colubridae. have been put into 13 different groupings which do not always correspond to the views of the present day colubrid taxonomists. (iv) In Hydrophiidae, speciation seems to have occurred through changes in the 4th pair of autosomes and sex chromosomes in general and the W chromosome in particular. Evidences are presented to show that fission and inversion have played an important role in bringing about the structural rearrangements in this group. (v) Family Viperidae according to taxonomists is divided into two subfamilies. Both the subfamilies are chromosomally very similar. More... »

PAGES

185-236

References to SciGraph publications

  • 1964-01. Close karyological kinship between the reptilian suborder serpentes and the class aves in CHROMOSOMA
  • 1967-12. Morphometrische Karyotypanalyse Einiger Schalangen-Arten in GENETICA
  • 1964-10. A TECHNIQUE FOR REMOVING SILVER GRAINS AND GELATIN FROM TRITIUM AUTORADIOGRAPHS OF HUMAN CHROMOSOMES in HEREDITAS
  • 1970-12. Multiple sex-chromosomes in the common Indian Krait, Bungarus caeruleus Schneider in CHROMOSOMA
  • 1968-09. Comparative cytogenetic studies in the order carnivora in CHROMOSOMA
  • 1972-01. MultipleW chromosome in a sea snake,Enhydrina schistosa daudin in CELLULAR AND MOLECULAR LIFE SCIENCES
  • 1964-12. NOMENCLATURE FOR CENTROMERIC POSITION ON CHROMOSOMES in HEREDITAS
  • 1969-06. A comparative study of the chromosomes of birds in CHROMOSOMA
  • 1971-09. Evolution of sex-chromosomes and formation of W-chromatin in snakes in CHROMOSOMA
  • 1968-01. W chromosome in the Indian water snake (checkered keel back)Natrix piscator (colubridae) in CELLULAR AND MOLECULAR LIFE SCIENCES
  • 1959-01. L'expression morphologique de la digamétie chez les sauropsidés et les monotrèmes in CHROMOSOMA
  • 1969. Cytologic Mechanisms of Karyotype Evolution in Insectivores in COMPARATIVE MAMMALIAN CYTOGENETICS
  • 1965-12. Cytogenetic mechanisms and speciations of mammals in IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY
  • 1969. Chromosomal Evolution in Rodents in COMPARATIVE MAMMALIAN CYTOGENETICS
  • 1971-09. Distribution of constitutive heterochromatin in mammalian chromosomes in CHROMOSOMA
  • 1971-09. Polymorphic patterns of heterochromatin distribution in guinea pig chromosomes in CHROMOSOMA
  • 1965-03. The comparative DNA content of 19 species of placental mammals, reptiles, and birds in CHROMOSOMA
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf00326193

    DOI

    http://dx.doi.org/10.1007/bf00326193

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1050723085

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/5066447


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