Why can only one sperm fertilize an egg

This would obviously be a problem in people. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. A leading candidate in some species is a dimeric sperm glycoprotein called fertilin , which binds to a protein in the oocyte plasma membrane and may also induce fusion. Even the sperm who reach the egg still have their work cut out for them. Split and merge into it.
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Click on the image below to watch a movie showing the events involved in the slow block to polyspermy! You can play as either a boy or a girl, on an adventure through Johto and Kanto, making the three GSC games the longest in the series.. The sperm and the egg each contain only half the normal number of chromosomes, a condition known as haploid. That said, there are the same number of chromosones in a sperm cell and the egg. Even sperm that are intrepid enough to get this far aren't home free. My contact number is
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Polyspermy - Wikipedia

Cleavage in the zebrafish embryo is limited to a small region on "top" of the yolky mass. Hello Katie1, Firstly, the pull-out method, coitus interruptus , or withdrawal method is not a safe birth control method because it does not prevent you from the transmission of STDs sexually transmitted diseases and HIV infection AIDs. Stephen Hawking's effort to find intelligent life just got a huge boost by Brandon A. Stay away from steroids: Polyspermy is a significant problem for in vitro fertilization of humans IVF. Binding of sperm to the zona pellucida is the easy part of fertilization.
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Where does the sperm and egg meet to be fertilized? Most embryos created this way do not survive. Membrane fusion actually an exocytosis and vesiculation expose the acrosomal contents, leading to leakage of acrosomal enzymes from the sperm's head. So we need to come up with a different way. Can clear sperm fertilize an egg? The egg would probably die, only one sperm can go into an egg.
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