Ribosomal gene reiteration in a marsupial species with an X-linked nucleolar organizer

Aust J Biol Sci. 1984;37(4):211-5. doi: 10.1071/bi9840211.


The number of ribosomal cistrons in somatic cells of males and females of Macropus eugenii have been estimated using RNA/DNA hybridization in 70% (v/v) formamide. The male has one X-linked active nucleolar organizer and the female two and while the number of ribosomal cistrons is variable between the four males examined (31-65 copies), it is substantially less than the number present in the three females (94-103 copies). There is, therefore, no evidence of dosage compensation by amplification.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Dosage Compensation, Genetic
  • Female
  • Genes*
  • Macropodidae / genetics*
  • Male
  • Marsupialia / genetics*
  • Nucleic Acid Hybridization
  • Nucleolus Organizer Region / analysis*
  • Ribosomes / analysis*
  • Sex Factors
  • X Chromosome