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14 Cards in this Set
- Front
- Back
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Formation of gonads in the embryo
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primordial germ cells (PGC) slipp off. these cells migrate to the gonads and originate in the germinal ridge. they are going to be either eggs or sperm.
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sex determination
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primordial germ cells are the same either you are a male or a female.
human: 22 chrom. are autosomal and 1 chrom is sexual male: XY female: XX |
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SRY gene
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it is referred as as the sex determinant region of the Y chromosome. If this gene is expressed, the individual develops into a male
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Two populations in the developing gonads
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Germ cell (PGC)
Somatic cells (A and B) |
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supporting cell in the male reproductive system
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sertoli cells
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sex-hormone producing cells in the male gonad
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Leydig cell
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Leydig cell produce
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testosterone
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supporting cells in the female gonad
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follicle cells
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sex hormone producing cells int the female gonad
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theca
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Gonad and Duct Development
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there are two series of ducts: wolfian duct and mullerian duct
AmH (anit mullerian hormone) is produced to tell the Mullerian to disappear. wolfian duct will develop into the urinary tract in the male gonad. |
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mullerian will develop into
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the uterus
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Anatomy of a sperm
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head: acrosome and nucleus
mid piede: mitochondria tail: flagella |
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Process in spermiogenesis (from spermatid to spermatozoo)
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-Nuclear condensation. Histones are replaced by protamine.
-Sperm cellular components such as mitochondria, flagella. |
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Function of cytoplasmic ridges
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help to synchronize all the germ cells into the same stage.
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