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Activation of embryonic genome in chick

Published online by Cambridge University Press:  01 August 1998

N. Zagris ,
K. Kalantzis  and
A. Guialis
N. Zagris
Affiliation:
Division of Genetics and Cell and Developmental Biology, Department of Biology, University of Patras, Patras, Greece
K. Kalantzis
Affiliation:
Division of Genetics and Cell and Developmental Biology, Department of Biology, University of Patras, Patras, Greece
A. Guialis
Affiliation:
Institute of Biological Research and Biotechnology, The National Hellenic Research Foundation, Athens, Greece
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Abstract

The earliest stages of development in most animals are under the control of maternally inherited information. The initiation of embryonic gene expression has been reported at the mid-blastula in amphibians and the mid-2-cell stage to the early morula in mammals. In chick embryos, embryonic gene expression was detectable at stage X (morula) and showed marked activation at stage XIII (blastula) with a gradual increase thereafter. Synthesis of rRNA and tRNA was low at stage X and was already the major class of RNA at stage XIII in chick embryos. The observed upregulation of RNA synthesis seems to coincide with a period of extensive fine structural differentiation when the first major cellular migrations start and signal the formation of the primitive streak in the chick embryo.

Keywords

Gene activityRNAChick embryo
Type
Research Article
Information
Zygote , Volume 6 , Issue 3 , August 1998 , pp. 227 - 231
Copyright
© 1998 Cambridge University Press

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