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  • 1970-1974  (2)
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  • 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
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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