Q.State five points of difference between Spermatogenesis and Oogenesis.
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Start your 14-day free trial to unlock the full solution →Spermatogenesis is a continuous, equal-division process starting at puberty that yields four motile sperm per cycle, while oogenesis is a discontinuous, unequal-division process starting before birth that yields just one egg (plus discarded polar bodies).
Spermatogenesis and oogenesis are the two gametogenesis processes in males and females respectively, and differ in five key ways: (1) Timing of onset and continuity — spermatogenesis begins only at puberty and then continues essentially uninterrupted throughout a man's reproductive life, whereas oogenesis begins during foetal development itself (primary oocytes are formed before birth) but is arrested at an early meiotic stage until puberty, resuming cyclically thereafter. (2) Site — spermatogenesis occurs in the seminiferous tubules of the testis, whereas oogenesis occurs in the ovary. (3) Number of functional gametes produced — each primary spermatocyte, through meiosis, gives rise to four equal-sized, functional spermatozoa, whereas each primary oocyte gives rise to only one large, functional ovum, along with two or three small, non-functional polar bodies that eventually degenerate. (4) Nature of division — spermatogenesis involves equal cytoplasmic division at each meiotic step, producing gametes of similar size, whereas oogenesis involves highly unequal cytoplasmic division, concentrating almost all the cytoplasm and nutrient reserve into the single large ovum while the polar bodies receive very little …
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