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The taxonomy of multivalent orientation: six modes of alternate or one?
Canadian Journal of Genetics and Cytology. Journal Canadien De Genetique Et De Cytologie
|June 1, 1984
Abstract:
Unlike adjacent I and II, alternate I and II orientations of interchange and tetrasome quadrivalents can be considered extremes within one particular population of orientations (alternate) and thus lack sufficient distinction to justify a separate taxonomic status. Within the population up to six types may be distinguished, but the biological significance of this distinction is small.