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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Chromosoma 48 (1974), S. 391-403 
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The constitutive heterochromatin, as demonstrated by the C band technique, may be subdivided into a number of categories when other characteristics are considered. The responses to fluorochromes QM and 33258 Hoechst, the behavior following G band staining, the repetitive DNA content, and many other criteria are useful for the classification of heterochromatin. The heterochromatin patterns of three mammalian species are presented to demonstrate that within each karyotype there may be several different types of C bands. In general, a correlation may also be made between GC-rich satellite DNA and dull (or negative) Q fluorescence, and between AT-rich satellite DNA and bright Q, fluorescence.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 24 (1974), S. 59-65 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Am menschlichen Y-Chromosom können mittels der Q-und C-Methoden 6 einzelne Abschnitte nachgewiesen werden, besonders wenn das Chromosom nicht stark kondensiert ist. Nach unseren Befunden bleibt der kurze Arm ungefärbt, während der lange Arm in 5 Abschnitte (Bänder) unterteilt werden kann: ein perizentrisches C-positives Band (Yq1), ein C-negatives Band Yq2, zwei C-positive Bänder Yq3 und Yq5, die gelegentlich in eine hellere und eine dunklere Zone unterteilt werden können und zwischen denen ein helles Band, Yq4, zu erkennen ist. Bei der Q-Methode bildet Uq4 den Spalt zwischen den beiden hell fluorescierenden Abschnitten. Die Befunde werden mikrodensitometrisch belegt. Das terminale Heterochromatin könnte durch eine Tandem-Duplikation entstanden sein.
    Notes: Summary The normal human Y chromosome was subdivided into 6 distinct bands by Q, C bandings and microdensitometric tracing. The best results were obtained from chromosomes not fully condensed. The results reveal that at late prophase the Y can be subdivided in 1 single unstained band in short arm 5 bands in the long arm. These 5 bands from centromere to telomere are: a pericentric C+ band Yq1; unstained band Yq2; C+ band Yq3; lightly stained band Yq4; and a C+ band Yq5. These observational results were substantiated by densitometric tracings. The Yq3 and Yq5 bands can sometimes be subdivided further into a dark and a light C+ zone. The Q band analysis indicates that the distal heterochromatin can be subdivided in two regions with the Yq4 band appearing as a lightly stained zone. We believe the terminal heterochromatin of the prevalent human Y represents a single tandem duplication.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 81 (1989), S. 196-198 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Based on four reported cases including the present case, 16p trisomic infants have remarkably similar features. These are severe developmental delay, psychomotor retardation, typical facies, and anomalies of extremities.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Euphytica 16 (1967), S. 385-390 
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Intraplant variation in smooth bromegrass was examined by determining pollen stainability and size in 6 moderately self-compatible S-2, and 12 self-incompatible OP-3 plants. Statistically significant differences in pollen stainability occurred between panicles within plants, between plants, and between plants x within plant interactions. Pollen diameter distributions for OP-3 plants tended to be trimodal, and bimodal distributions occurred in S-2 plants. In trimodal distributions, peaks occurred at known diploid and tetraploid chromosome levels, and it is presumed that the peak between these represented the triploid gametic number.
    Type of Medium: Electronic Resource
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