1) discuss the origin of sperm and testosterone. 2) discuss the origin of the ovum and...

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Medical Sciences

1) discuss the origin of sperm and testosterone.
2) discuss the origin of the ovum and both estrogen andprogesterone.

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First questionSpermatogenesisSpermatogenesis is the process by which the male gametes calledspermatozoa sperms are formed from the primitive spermatogeniccells spermatogonia in the testis It takes 74 days for theformation of sperm from a primitive germ cellStages of spermatogenesisStage of ProliferationEach spermatogonium contains a diploid number 23 pairs ofchromosomes During the proliferative stage spermatogonia divideby mitosis without any change in chromosomal number This resultsin the formation of primary spermatocyteStage of GrowthIn this stage the primary spermatocyte grows into a large cellApart from growth there is no other change in spermatocyte duringthis stageStage of MaturationAfter reaching the full size each primary spermatocyteundergoes meiotic division which occurs in two See Answer

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