Probleme der biologischen Reduplikation: Funktionelle und morphologische Organisation der Zelle

Lampbrush chromosomes which are chromosomes in meiotic pro- phase with laterally projecting loops, have been observed in oocyte nuclei of several vertebrate, some invertebrate species, and in spermato- cyte nuclei of Drosophila species. Especially large lampbrush chromo- somes occur in oocytes of the urodele Amphibia and in spermatocyte nuclei of Drosophila hydei and some other species belonging to the hyde i- subgroup. In Amphibia the premeiotic chromosomes show a chromomeric organization ...