DO SPERMATOZOA PENETRATE THE MEMBRANE OF SELF-INSEMINATED EGGS OF CIONA AND STYELA?
Open Access
- 1 June 1942
- journal article
- research article
- Published by University of Chicago Press in The Biological Bulletin
- Vol. 82 (3) , 455-460
- https://doi.org/10.2307/1537991
Abstract
A comparison of unfertilized eggs of Ciona with self- and cross-fertilized eggs show that spermatozoa do not, as a rule, penetrate the membrane of their own eggs. Rarely a sperm may be found inside a self-inseminated egg, which is consistent with the fact that occasionally self-fertilization occurs. Even in cross-fertilized eggs only a very few sperm are found inside the membrane of such eggs. The same statement holds for two species of Styela examined, except that a few more sperm are likely to be found inside the membrane of the self-inseminated eggs, which is consistent with the fact that self-fertilization is more frequent in these species than in Ciona.This publication has 2 references indexed in Scilit:
- The genetic and the physiological problems of self‐sterility in Ciona. III. Induced self‐fertilizationJournal of Experimental Zoology, 1939
- The genetic and the physiological problems of self-sterility in Ciona. I. Data on self- and cross-fertilizationJournal of Experimental Zoology, 1938