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Nuclear DNA Content Variability in Xenopus laevis: A Redundancy Regulation common to all Gene Families

Nature volume 242, pages 615–617 (1973)Cite this article

Abstract

IN an earlier communication1 we presented data about the number (R) of redundant rRNA genes in somatic cells of several species of amphibians. We also determined the number (A) of extrachromosomal nucleoli produced during oogenesis by genetic amplification. Both R and A are constant for each species and vary among different species falling into categories following a geometrical progression (A and R = 2n).

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Author information

Authors and Affiliations

  1. Centra degli Acidi Nucleici del CNR, Istituto di Fisiologia Generale,

    F. AMALDI & P. A. LAVA-SANCHEZ

  2. Istituto di Istologia ed Embriologia, Facoltà di Scienze, Università di Roma,

    M. BUONGIORNO-NARDELLI

Authors
  1. F. AMALDI
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  2. P. A. LAVA-SANCHEZ
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  3. M. BUONGIORNO-NARDELLI
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AMALDI, F., LAVA-SANCHEZ, P. & BUONGIORNO-NARDELLI, M. Nuclear DNA Content Variability in Xenopus laevis: A Redundancy Regulation common to all Gene Families. Nature 242, 615–617 (1973). https://doi.org/10.1038/242615a0

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