fertilization membrane


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fertilization membrane

[′fərd·əl·ə′zā·shən ‚mem‚brān]
(cell and molecular biology)
A membrane that separates from the surface of and surrounds many eggs following activation by the sperm; prevents multiple fertilization.
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For animals that do not display a fertilization membrane, such as polychaetes, bivalves, and gastropods, fertilization success is sometimes assessed by the ability of eggs to cleave (e.
The vitelline membrane raises up and forms the fertilization membrane (Figs.
Purification and properties of ovoperoxidase, the enzyme responsible for hardening the fertilization membrane of the sea urchin egg.
The embryo then began to spin inside the fertilization membrane and hatched 96 h later [ILLUSTRATION FOR FIGURE 9E OMITTED].
One egg aliquot was immediately assayed to determine the presence of (1) fertilization membranes, or (2) immature or abnormal eggs.
Percentage fertilization was calculated by counting the number of eggs with fertilization membranes in a random sample of more than 100 from each experiment.