FERTILIZATION Fertilization is the process by which male and female gametes fuse.
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FERTILIZATIONFertilization is the process by which male and female gametes fuse.
SITE OF FERTILIZATION ampullary region of the uterine tube
JOURNEY OF SPERM INTO FEMALE GENITAL TRACT
CHANGES IN SPERMATOZOA IN FEMALE GENITAL TRACT
Freshly ejaculated Spermatozoa unable to fertilize the oocyte it undergo 2 changes to fertilize the ova
(a) capacitation (b) acrosome reaction
CAPACITATION
``Capacitation is a period of conditioning in the female reproductive tract`` lasts approximately 7 hours. occurs in the uterine tube Much of this conditioning, entails epithelial
interactions between the sperm and mucosal surface of the tube.
During this time, a glycoprotein coat and seminal plasma proteins are removed from the plasma membrane that overlies the acrosomal region of the spermatozoa.
Only capacitated sperm can pass through the corona cells and undergo the acrosome reaction.
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RESULTS OF FERTILIZATION1. Restoration of the diploid number of
chromosomes.2. Determination of the sex of the new
individual.3. Initiation of cleavage.4. Trasportation of gentic features of
parentes.
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Interaction between sperm and egg is species specific
The Acrosomal ReactionCaused by interaction of the sperm with molecules of the
zona pellucida
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