In human beings, what is the ratio of the number of gametes produced from one male primarysex cell to the number of gametes produced from one female primary sex cell?
Correct answer: D. 4 : 1
- A. 1 : 3
- B. 1 : 4
- C. 3 : 1
- D. 4 : 1
Explanation
The correct answer is 4 : 1. In human males, each primary sex cell (spermatocyte) undergoes meiosis to produce four sperm cells. In contrast, in human females, each primary sex cell (oocyte) undergoes meiosis but typically results in the formation of one viable egg and three polar bodies that are not functional as gametes. Therefore, the ratio of gametes produced is 4 (sperm) to 1 (egg). Other options are incorrect as they do not accurately represent this biological process.
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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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