SOME CHARACTERISTICS OF PARENT-OFFSPRING REGRESSION IN BODY WEIGHT OF MUS MUSCULUS AT DIFFERENT AGES

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Abstract
This study was undertaken to test the linearity assumption of parent-offspring regression in body weight of Mus musculus. A highly significant non-linearity of parent-offspring regression was found in the raw data. Three methods of data correction were tested and found equally effective in adjusting the data for sex and litter size. It made the parent-offspring regression more linear. But after such adjustment, non-linearity of parent-offspring regression still existed at almost all ages reported in this paper. Four types of curvilinear parent-offspring regression and linear regression were recognized in all 11 days of age reported.Neither a characteristic which is common to the types of parent-offspring regression at all days of age nor a tendency of the change in curvilinearity according to the growth of Mus musculus could be found.

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