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  • 1985-1989  (3)
  • 1970-1974  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    A new interpretation of the sex determining mechanism of the European earwig,Forficula auricularia (1970)
    Springer
    Cellular and molecular life sciences 26 (1970), S. 1387-1389 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto Osservazioni su femmine diForficula auricularia L. indicano che esse possiedono un solo cariotipo formato da 22 autosomi e da 2 cromosomiX. Sulla base di questo studio, suggeriamo che i maschi con 3 cromosomi sessuali sono del tipoXYY, e nonXXY come precedentemente ritenuto da varii autori. Ci sono maschiXY 1t, XY2, XY2Y2 e mosaiciXY 2/XY2Y2 nella popolazione. Inoltre viene dimostrato che solamente il più grande dei due cromosomi Y, che caratterizzano questa specie, viene accumulato nei maschi con un meccanismo multiple di cromosomi sessuali.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02113049
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cytogenetics of the parthenogenetic grasshopper Moraba virgo and its bisexual relatives (1972)
    Springer
    Chromosoma 40 (1972), S. 199-212 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract An undescribed bisexual grasshopper species closely related to the all-female parthenogenetic Moraba virgo has an X1X2Y sex chromosome mechanism which incorporates 7 chromosomes of the ancestral karyotype (the original X and three pairs of autosomes). Apparently three separate chromosomal fusions have occurred, one of these being a tandem fusion followed by a crossover which ‘stabilized’ it in the sex chromosome system. M. virgo probably arose from an ancestor which had X1X2Y males but lacked the tandem fusion present in the new species, the females of virgo having the constitution X1X1X2O.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00321465
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Localization of the coagulation factor XIII B subunit gene (F13B) to chromosome bands 1q31–32.1 and restriction fragment length polymorphism at the locus (1989)
    Springer
    Human genetics 〈Berlin〉 81 (1989), S. 157-160 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In situ hybridization of tritiated cDNA probes for the gene for the B subunit of coagulation factor XIII localized the F13B locus to bands q31–q32.1 on human chromosome 1 and perhaps more precisely to sub-bands 1q31.2 or 1q31.3. Restriction fragment length polymorphisms (RFLPs) were detected with BglII, EcoRI and XbaI. Because the RFLPs detected with each of the three enzymes were concordant in every individual studied and since each showed a similar size difference, it was concluded that the RFLPs probably result from an insertion or deletion of length approximately 0.37–0.4 kb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00293893
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Conservation of nucleolar structure in polytene tissues of Ceratitis capitata (Diptera: Tephritidae) (1989)
    Springer
    Chromosoma 98 (1989), S. 443-449 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Nucleolar structure was studied in mitotic and three polytene tissues of the Mediterranean fruit fly, Ceratitis capitata using in situ hybridization with a tritium-labelled rDNA probe and silver staining. In mitotic metaphase chromosomes nucleolar organiser regions were localised in the short arms of both sex chromosomes. In polytene nuclei of trichogen cells, salivary glands and fat body rDNA was detected within nucleoli. Nucleoli in these tissues have a similar structure with rDNA labelling concentrated in a central core. Silver staining resulted in very heavy staining of polytene nucleoli and interphase nucleoli in diploid cells. Silver staining of nucleolar organisers in metaphase chromosomes is weak or absent although the X chromosome has numerous dark silver bands in other locations. The results suggest that nucleolar structure is conserved in polytene tissues contrasting with the variability of autosomal banding patterns and sex chromosome structure. They also indicate that silver staining is not necessarily specific for nucleolar regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00292790
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Chromosome deletion at 11q23 in an abnormal child from a family with inherited fragility at 11q23 (1987)
    Springer
    Human genetics 〈Berlin〉 76 (1987), S. 202-204 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A neonate with clinical features of the 11q23 deletion syndrome was apparently mosaic with the dominant cell line showing deletion of the chromosomal segment 11q23.3 to 11qter. The presence of a few lymphocytes with a normal karyotype indicates post-zygotic deletion of chromosome 11. The mother and brother of the propositus show folate-sensitive fragility at band 11q23.3. This case indicates in vivo deletion at a folate-sensitive fragile site.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284923
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    Paper (German National Licenses)
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