Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The X-chromosome of Microtus agrestis (2 n=50), comprising about 20 per cent of the homogametic haploid (AX) set, is the largest X-chromosome reported so far in placental mammals. It is four times the size of the X possessed by a great majority of mammals, including the human and the mouse. The Y-chromosome is also enormous, almost three-fifths the size of the X. The present cytological study concerned somatic interphase and prophase nuclei as well as the DNA replication pattern revealed by labeling cultured bone marrow cells with tritiated thymidine. In the male nuclus, the entire Y as well as the long arm and proximal part of the short arm of the X are late labeling and positively heteropycnotic. In the female, one entire X is late labeling and condensed, while the other X shows the same labeling pattern as the male X. Thus the pattern of inactivation of this huge X is such that in each diploid nucleus of both sexes, the amount of euchromatic X-chromosome material is the same as it is in the majority of placental mammals in which the X comprises about five per cent of the haploid set.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 13 (1971), S. 241-243 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung In 2 verwandten Familien einer Sippe hatten 5 von 8 Kindern Anencephalie und/oder Meningocele. Die Väter beider Familien waren Brüder, die Mütter Schwestern. Das Studium der Kirchenbücher ergab, daß die Ehepartner außerdem Vettern und Basen dritten Grades waren. Weder den Eltern noch dem Hausarzt waren bei weiteren Verwandten Fehlbildungen ähnlicher oder anderer Art bekannt. Der Stammbaum macht autosomal-recessiven Erbgang der Schulßstörung des Neuralrohres in dieser Familie sehr wahrscheinlich, es kann jedoch nicht mit voller Sicherheit ausgeschlossen werden, daß erblich bedingte intrauterine Faktoren entscheidend waren.
    Notes: Summary Anencephaly and/or spina bifida has been observed in 5 of 8 children from 2 related families. The fathers of both families were brothers and had married 2 sisters. By further investigation they could be shown to be third degree cousins to their marriage partners. No malformations were known among further relatives. The family pattern suggests autosomal recessive inheritance of anencephalus and/or spina bifida in this family, although it could not be excluded, that genetically determined intrauterine factors were of importance.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...