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Genetical studies on the skeleton of the mouse XXVI. Pintail*

Published online by Cambridge University Press:  14 April 2009

R. J. Berry
R. J. Berry
Affiliation:
Medical Research Council Experimental Genetics Research Unit, University College London
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1. The gene for Pintail (symbol Pt) shows no dominance. Heterozygotes are viable and fertile; many homozygotes die early in life, but the survivors appear to breed normally. Pt reinforces the effects of Sd and T on the tail; there is no evidence for interaction between Pt and + /vt.

2. The gene produces a shortening of the tail, but the most marked effect on the adult is in the great reduction of the nucleus pulposus of the intervertebral discs, which may lead to tail kinks in some animals.

3. Pintail embryos can be recognized from the eleventh day stage of development onwards by the possession of a much smaller notochord than normal. This reduced notochord is the result of a reduced rate of cell division which first manifests itself in 10-day embryos. Perhaps this reduced rate is the result of altered relations of the notochord with tail-gut and neural tube in 10-day embryos.

Type
Research Article
Information
Genetics Research , Volume 1 , Issue 3 , November 1960 , pp. 439 - 451
Copyright
Copyright © Cambridge University Press 1960

References

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