Abstract
Employing a heterogeneous line developed from a four-way cross between unrelated inbred strains of mice, 12 behavioral components, body weight, and testis weight were measured in groups of adult animals segregating with respect to two coat-color genes and carrying Y chromosomes from different origins. Both somatic characteristics appeared to be influenced by autosomal as well as Y-linked factors. Autosomes 4 and 9 are clearly involved in the determination of tail-rattling, registered in an agonistic context, but involvement of Y-chromosomal loci is unlikely. In contrast, a heterosomal, and no autosomal, effect became evident with regard to open-field locomotion in these mice.
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