Which of the following statements about spermatogenesis and oogenesis is false?
ID: 3474667 • Letter: W
Question
Which of the following statements about spermatogenesis and oogenesis is false?
a. Meiosis II does not complete in oogenesis unless fertilization takes place.
b. Meiosis I begins during the fetal period but is arrested in oogenesis.
c.Spermatogenesis begins at puberty and continues throughout the male's lifetime, whereas the total number of oocytes a woman will produce is determined before birth.
d.Spermatogenesis results in one spermatid and two polar bodies, whereas oogenesis results in four ova.
Explanation / Answer
Answer: Option D
Reasoning:
Options A and B are correct as Meiosis II does not complete in oogenesis unless fertilization takes place while Meiosis I begins during the fetal period but is arrested in oogenesis. In females, the Meiosis I stage begins during embryonic development but pauses in the diplotene stage of prophase I until the person reaches puberty. Regarding meiosis II, immediately after meiosis I, the haploid secondary oocyte initiates meiosis II, but this process is halted at the metaphase II stage until fertilization.
Option C is also correct as in males spermatogenesis begins at puberty and continues throughout his lifetime, whereas the total number of oocytes a woman will produce is determined before birth and the zygotic stage itself.
Coming to the fourth option, the statement is false. Spermatogenesis results in 4 spermatids and zero polar bodies while oogenesis results in 1 ovum and 3 polar bodies. There is no polar body production in spermatogenesis and it is a typical feature of oogenesis. So, the statement spermatogenesis results in one spermatid and two polar bodies, whereas oogenesis results in four ova is false.
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