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Clinostat exposure and symmetrization of frog eggsSince the orientation of unfertilized eggs and the righting of eggs after grey crescent formation do not affect the axes, attention here is directed toward a comparative study of the initial rotation of the fertilized egg, the so-called rotation of orientation (R-of-O). The goal of the investigation is to determine the timing and dynamics of the R-of-O (as distinct from inversion rotations), to confirm prior observations, and to examine the influence of gravity compensation at periods that might be crucial. Gravity compensation for 1 hr during the R-of-O is found to yield fewer abnormalities. It is hypothesized that it changes the axes and that return to normal conditions permits regulation. Longer exposure is found to yield more abnormalities, perhaps by perturbing both the action of the aster and regulation.
Document ID
19820057222
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Nace, G. W.
(Michigan, University Ann Arbor, MI, United States)
Tremor, J. W.
(NASA Ames Research Center Biosystems Div., Moffett Field, CA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
Life Sciences (General)
Accession Number
82A40757
Funding Number(s)
CONTRACT_GRANT: NAS2-10945
CONTRACT_GRANT: NAGW-29
Distribution Limits
Public
Copyright
Other

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