Are paw preference differences in HI and LO mice the result of specific genes or of heterosis and fluctuating asymmetry?
نویسنده
چکیده
Collins (1985) has described two separate mouse strains, obtained by selective breeding, which differ in having high (HI) or low (LO) degrees of paw preference on a standard test. In this paper I argue that the differences between these strains may not be due to a specific gene (or genes) but, instead, probably reflect differences in the total heterozygosity of the strains, such that the HI strain is more heterotic than the LO strain. Greater degrees of heterozygosity are argued to buffer against fluctuating asymmetry and hence result in a greater degree of paw preference.
منابع مشابه
Path analysis of sex difference, forebrain commissure area and brain size in relation to degree of laterality in selectively bred mice.
Male and female mice from HI and LO lines selectively bred by Collins for strength of lateralization were tested for paw preference and then studied histologically to assess size of forebrain commissures and myelination of the corpus callosum. When compared to LO line mice, HI line mice were more strongly lateralized for paw preference and had larger brains as well as greater cross-sectional ar...
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ورودعنوان ژورنال:
- Behavior genetics
دوره 22 4 شماره
صفحات -
تاریخ انتشار 1992