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Segmental aneuploidy and the genetic gross structure of the Drosophila genome.
By combining elements of two Y-autosome translocations with displaced autosomal breakpoints, it is possible to produce zygotes heterozygous for a deficiency for the region between the breakpoints,Expand
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Ionic mechanism of the fertilization potential of the marine worm, Urechis caupo (Echiura)
Microelectrode and tracer flux studies of the Urechis egg during fertilization have shown: (a) insemination causes a fertilization potential; the membrane potential rises from an initial level of -33Expand
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Electrically mediated fast polyspermy block in eggs of the marine worm, Urechis caupo
Previous work has established that the polyspermy block in Urechis acts at the level of sperm-egg membrane fusion. (J. Exp. Zool. 196:105). Present results indicate that during the first 5--10 minExpand
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Fertilization acid of sea urchin eggs: evidence that it is H+, not CO2.
Abstract The report of R. J. Gillies, M. P. Rosenberg, and D. W. Deamer (1981, J. Cell. Phys. , 108, 115–122) that sea urchin fertilization acid is anaerobically produced CO 2 , was reinvestigated byExpand
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Fertilization acid release in Urechis eggs. I. The nature of the acid and the dependence of acid release and egg activation on external pH.
The amount of fertilization acid produced by eggs of Urechis caupo , monitored by automatically back-titrating egg suspensions with base, depends linearly on the pH of the seawater. Above pH 7.0, atExpand
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Fine structural investigation of the insemination response in Urechis caupo.
Electron microscopy of Urechis eggs revealed no changes in the egg cortex or investing layers until 4 min after insemination at 17†C. From 4 min to about 30 min after insemination the surface coatExpand
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Localized gating of egg Na+ channels by sperm
Eggs of many species respond to sperm with a positive shift in membrane potential, the fertilization potential1, which in several2–5 but not all6 species mediates a block to polyspermy. How the spermExpand
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Electrophysiological response to insemination in oocytes of Urechis caupo.
We investigated the response to insemination of coelomic oocytes of the marine worm Urechis caupo with light and electron microscopy, electrophysiology, and by measuring ion fluxes. AfterExpand
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The Y chromosome and sperm length in D. melanogaster.
Abstract Contrary to earlier reports, the sperm length of D. melanogaster males with two Y chromosomes is the same as in males with one Y chromosome.
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Chapter 3 – ECHIURA
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