The reduction of genic activity in the tetraploid amphibianOdontophrynus americanus is not due to loss of ribosomal DNA

@article{Schmidtke1976TheRO,
  title={The reduction of genic activity in the tetraploid amphibianOdontophrynus americanus is not due to loss of ribosomal DNA},
  author={Joerg Schmidtke and Willy Beçak and Wolfgang F. Engel},
  journal={Experientia},
  year={1976},
  volume={32},
  pages={27-28}
}
Genic activity in tetraploid members of the amphibian speciesOdontophrymus americanus is reduced to that of diploid ones. Loss of ribosomal genes, a mechanism suggested by others as a means of decreasing genetic activity, could be ruled out. The diploids and the tetraploids have almost identical proportions of their genomes complementary to (28s+18s) ribosomal RNA. 

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