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Further morphological effects of the short ear gene in the house mouse

✍ Scribed by Margaret C. Green

Publisher
John Wiley and Sons
Year
1951
Tongue
English
Weight
998 KB
Volume
88
Category
Article
ISSN
0362-2525

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✦ Synopsis

It has been shown that the short ear gene (seautosomal recessive) in the house mouse has a number of morphological effects (Lynch, '21; Snell, '31, '35; Castle et al., '36; Law, '38; Green and McNutt, '41; Green and Green, '46b). These effects include reduction in size of the ear, reduction in body size, change in shape of the head, reduction in number of ribs, and abnormal shape or absence of the xiphisternum. It is possible to relate this wide variety of effects to a single action of the short ear gene if it is assumed that the gene has its effect primarily upon cartilage.

The acceptance of this hypothesis will depend upon completing the catalogue of effects of the gene and eliminating other possible explanations of the observed differences. This paper is a report of the results of a search for further effects of the short ear gene on 32 anatomical parts or dimensions. T n addition to new effects upon cartilage and bone, the short ear gene appears to be associated with the occurrence of hydrotic kidneys, a ventral hiatus in the diaphra,gm, and a reduction in 1-iver weight.

STRAINS AND METHODS

The observations were made on the inbred strains S e x -A b and Sese-C described in a previous paper (Green and Green, '46b) and referred to there as A b and C. These strains have been inbred by brother-sister matings with forced heterozy-1

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