Abstract
RABBIT eggs subjected in vivo to cold-shock treatment seldom abstrict the second polar body1, but frequently form one or two nuclei, resembling pro-nuclei, and may later undergo cleavage1,2. The response of the rat egg to cold-shock is different, in that the abstriction of the second polar body regularly occurs and the group of chromosomes remaining within the egg commonly becomes scattered1,3. Nucleus formation and cleavage have not been seen, but mostly the observations were restricted to a period of a few hours after the application of the stimulus.
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References
Thibault, C., Ann. Sci. Nat. Zool., 11, 136 (1949).
Pincus, G., and Shapiro, H., Proc. Amer. Phil. Soc., 83, 631 (1940).
Austin, C. R., and Braden, A. W. H., Aust. J. Biol. Sci. (in the press).
Austin, C. R., J. Endocrin., 6, 104 (1949).
Austin, C. R., and Braden, A. W. H., Aust. J. Biol. Sci. (in the press).
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AUSTIN, C., BRADEN, A. Nucleus Formation and Cleavage induced in Unfertilized Rat Eggs. Nature 173, 999–1000 (1954). https://doi.org/10.1038/173999a0
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DOI: https://doi.org/10.1038/173999a0
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