Abstract
The seven macrochromosomes of the chaffinch (Fringilla coelebs L.) are described in their lampbrush form. The relative lengths of bivalents, the positions and arrangements of chromosomal regions with lateral loops of similar length and appearance, as well as the positions of protein bodies and loops of peculiar morphology have been defined and mapped, so that each of the seven lampbrush macrobivalents may be identified in oocytes from every individual of the species. This morphological analysis has been supplemented by determining the positions of certain loci and objects that are specifically and consistently labelled after immunostaining or fluorescence in-situ hybridization with defined molecular probes.
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