Moderate

How many sperm are formed from a secondary spermatocyte:

Correct answer: C. 2

  • A. 4
  • B. 8
  • C. 2
  • D. 1

Explanation

One secondary spermatocyte form two sperm cells. Here is the process of sperm production: Meiosis I: A primary spermatocyte undergoes meiosis I, which is a type of cell division that reduces the number of chromosomes by half. This results in two secondary spermatocytes, each with 23 chromosomes (haploid in terms of chromosomes but 2n as there is duplicated DNA i.e. each chromosome comprises of two chromatids). Meiosis II: Each secondary spermatocyte then undergoes meiosis II, which is another type of cell division that reduces the number of chromosomes by half again. This results in four spermatids, each with 23 chromosomes (single chromosome with haploid DNA). Spermatogenesis: The spermatids then undergo a process called spermatogenesis, which is a series of changes that transforms them into sperm cells. The changes include the development of a flagellum, which is the tail that allows the sperm cell to swim, and the formation of a head that contains the genetic material. Option A is not correct because 4 sperms are produced by the division of one primary spermatocyteOption B is not correct because 8 sperms are produced by the division of 2 primary spermatocyteOption D is not correct because it doesn't align with the stages and outcomes of spermatogenesis

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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.

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