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  • 1970-1974
  • 1965-1969  (3)
  • 1966  (3)
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Years
  • 1970-1974
  • 1965-1969  (3)
Year
  • 1
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    Unknown
    The Juridical Basis of Communal Associations in Mediaeval Rabbinic Legal Thought (1966)
    New York : Periodicals Archive Online (PAO)
    Jewish social studies. 28:2 (1966:Apr.) 67 
    Details
    ISSN: 0021-6704
    Topics: Ethnic Sciences , History , Theology and Religious Studies
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1106-1966-028-02-000001
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Does Vicia faba have Multi-stranded Chromosomes? (1966)
    [s.l.] : Nature Publishing Group
    Nature 211 (1966), S. 650-651 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the hemipteran tribe Pentatomini, the occurrence of species which have a tetraploid number of autosomes but DNA values like diploids4 suggests that the latter have twice as many strands per chromosome as the former. This example illustrates the value of studying species related to those which ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/211650a0
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  • 3
    Electronic Resource
    Electronic Resource
    A complex sex-chromosome system in the hare-wallaby Lagorchestes conspicillatus Gould (1966)
    Springer
    Chromosoma 19 (1966), S. 159-175 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Among specimens of the spectacled hare-wallaby Lagorchestes conspicillatus Gould (Marsupialia, family Macropodidae) 4 males had 15 chromosomes and 2 females 16 chromosomes. The sex chromosomes are X1X1X2X2 in the female and X1X2Y in the male, the Y being metacentric and both X chromosomes are acrocentric. In about 96% of sperm mother cells at meiosis the sex chromosomes form a chain trivalent and in more than 99% of these this orients convergently so that the X1 and X2 move to the same pole. Evidence is presented that L. conspicillatus has evolved from a form with 22 chromosomes including a small X and a minute Y. Autoradiographic studies show that the proximal fifth of the X1 chromosome replicates late. This is probably the ancestral X chromosome which has been translocated to an autosome. The fate of the original Y is obscure but an hypothesis is proposed that it forms the centromeric region of the Y. A single male had 14 chromosomes and was heterozygous for a translocation involving the centric fusion of two acrocentric autosomes. In about 30% of sperm mother cells the autosomal trivalent did not disjoin regularly but, despite this, all secondary spermatocytes observed at metaphase 2 had balanced complements of chromosomes. It is assumed that unbalanced secondary spermatocytes died before reaching metaphase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00293681
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