Which of the following directly develops into sperms?
Correct answer: B. Spermatids
- A. Primary spermatocytes
- B. Spermatids
- C. Secondary spermatocytes
- D. Spermatogonia
Explanation
Spermatids are the end result of the process of meiosis. They, then, undergo specialization which includes growing flagella, and acrosomes and having a greater quantity of mitochondria to form the spermatozoa.Each testis consists of a highly complex duct system called seminiferous tubules, in which repeated division by the cells of the germinal epithelium produce spermatogonia[option D].These increase in size and differentiate into primary spermatocytes[option A] which undergo meiotic division to form secondary spermatocytes[option C] and spermatids. Eventually, the spermatids differentiate into mature sperms.[option B]
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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The human reproductive system includes the male and female organs that produce gametes, secrete sex hormones and support fertilization and development. Questions cover the testes, ovaries, reproductive ducts, menstrual and ovarian cycles, ovulation, fertilization, implantation, placenta formation and the roles of FSH, LH, oestrogen, progesterone and testosterone.
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