Abstract
THE uniformity of first crosses of inbred strains as compared with the parental stocks has now been demonstrated on a number of occasions and the literature on the subject has been extensively reviewed by Lerner1 and by Biggers, McLaren and Michie2. The work of Michie and McLaren3,4 is of particular interest here for, as well as demonstrating the effect of heterosis on variation, they used as their metameter barbiturate sleeping time in mice. The work reported here was an investigation of the interaction between this genetic influence on variation and an aspect of the social environment, group size.
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References
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MACKINTOSH, J. Effect of Strain and Group Size on the Response of Mice to ‘Seconal’ Anæsthesia. Nature 194, 1304 (1962). https://doi.org/10.1038/1941304a0
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DOI: https://doi.org/10.1038/1941304a0
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