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Quarterly Journal of Microscopical Science, Vol s3-94, 391-397, Copyright © 1953 by Company of Biologists

The Structure of the Spermatozoa in Dextral and Sinistral Races of Limnaea peregra

G. G. SELMAN 1 and C. H. WADDINGTON 1

1 Institute of Animal Genetics, Edinburgh

Spermatozoa from dextrally and sinistrally coiled races of Limnaea peregra were examined by the use of an electron microscope. Helical fibres in the middle and tailpieces of the sperm were found to be dextrally coiled in preparations from individuals of both races. It is concluded that the genes which determine the direction of spiral cleavage in Limnaea do not control coiling in the sperm.

The structural features of the sperm are discussed in the light of limitations imposed by geometrical considerations on the form of the helical fibres.






© The Company of Biologists Ltd 1953