Download PDF by Ernst Mayr (auth.), Kurt Benirschke (eds.): Comparative Mammalian Cytogenetics: An International

By Ernst Mayr (auth.), Kurt Benirschke (eds.)

ISBN-10: 3642859437

ISBN-13: 9783642859434

ISBN-10: 3642859453

ISBN-13: 9783642859458

Ten years in the past a symposium on Cytotaxonomy 'was held in London (Proc. Linn. Soc. Lond. 169:110, 1958) within which a primary try used to be made to assemble numerous disciplines to debate advances of mammalian cytogenetics and to place them into right context with the sciences of evolution and taxonomy. The introductory comments by means of \V. B. Turrill to that symposium, primarily an admonishment to be tolerant of the quick­ comings of our respective disciplines, will be a ultimate start­ ning to this convention as ,,'ell. despite the fact that, the assembly held at Hanover used to be conceived extra alongside the traces of comments made through R. B. Seymour Se,,'ell in his presidential tackle to a similar society: "It has been acknowledged that scientists during this look for fact are these days an excessive amount of keen on the buildup of proof, and make too little use in their imagina­ tion of their makes an attempt to give an explanation for such proof as they've got collected. " (In "The continental glide idea and the distribution of the Copepoda," ibid. 166:149, 1956. ) \\Tith this as a history, years in the past we held the 1st of a chain of loosely-structured meetings on reproductive failure within the stress-free surroundings of this small New England collage neighborhood. The manu­ scripts of that assembly were released (Comparative facets of Re­ effective Failure, Springer-Verlag ny Inc. , 1967).

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Extra info for Comparative Mammalian Cytogenetics: An International Conference at Dartmouth Medical School Hanover, New Hampshire, July 29—August 2, 1968

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Trujillo, J. , B. Walden, P. O'Neil and H. B. Anstall: Sex-linkage of glucose6-phosphate dehydrogenase in the horse and donkey. Science 148:1603, 1965. Wahrman, J. and Z. Zahavi: Cytological contributions to the phylogeny and classification of the rodent genus Gerbillus. ) 175:600, 1955. Wallace, H. and M. L. Birnstiel: Ribosomal cistrons and the nucleolar organizer. Biochem. Biophys. Acta 114:296, 1966. , G. Flinspach, R. B5hm and S. Ohno: DNS-Reduplikations-muster bei den Riesen-Geschlechtschromosomen von Microtus agrestis.

N ancient jawless fish (bottom left) probably had 48 acrocentrics in the diploid chromosome complement, and its genome size was only 20% of that of mammals. During the aquatic stage of evolution, extensive experiments with gene duplication took place. Some have increased their genome size exclusively by regional duplication of chromosomal segments. The extreme example of this is seen in lungfish and salamanders. Although some of them attained the genome size 36 times greater than that of mammals, their redundant genetic material have not contributed to the creation of new gene loci.

Benirschke and H. Noe1ke: Unusually large sex chromosomes on the sitatunga (Tragelaphus spekei) and the black buck (Antilope cervicapra). Chromosoma 23 :317, 1968. GEOGRAPHIC VARIATION OF CHROMOSOME FORMS IN SPALAX, A SUBTERRANEAN MAMMAL OF RESTRICTED MOBILITY J. WAHRMAN, RUTH GOITEIN AND E. NEVO Laboratory of Genetics, The Hebrew University, Jerusalem, Israel Several different types of rodents are found among the specialized mammals exploiting the subterranean ecological niche. Tunnels dug by them can often be detected through the mounds of earth thrown up during the burrowing.

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Comparative Mammalian Cytogenetics: An International Conference at Dartmouth Medical School Hanover, New Hampshire, July 29—August 2, 1968 by Ernst Mayr (auth.), Kurt Benirschke (eds.)

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