Given below is the schematic representation of spermatogenesis in human males:
Choose the option that shows the correct labelling of ‘I’, ‘II’, ‘III’ and ‘IV’ in the given diagram.
Given below is the schematic representation of spermatogenesis in human males:
Choose the option that shows the correct labelling of ‘I’, ‘II’, ‘III’ and ‘IV’ in the given diagram.
Show Hint
- spermatozoa, spermatid, sec. spermatocyte, spermatogonia
- spermatid, spermatogonia, sec. spermatocyte, spermatozoa
- spermatogonia, sec. spermatocyte, spermatozoa, spermatid
- spermatogonia, sec. spermatocyte, spermatid, spermatozoa
The Correct Option is D
Solution and Explanation
Spermatogenesis and Labelling of Stages
Step 1: Understanding the Process of Spermatogenesis
Spermatogenesis is the process of sperm cell development in males, occurring in the seminiferous tubules of the testes. The key stages are:
- Spermatogonia: The primordial germ cells that divide by mitosis to form primary spermatocytes.
- Primary Spermatocytes: These undergo meiosis to form secondary spermatocytes.
- Secondary Spermatocytes: These undergo a second meiotic division to form spermatids.
- Spermatids: These undergo maturation (spermiogenesis) to become spermatozoa (mature, motile sperm cells).
Step 2: Analyzing the Diagram
The diagram below represents the stages of spermatogenesis. Based on the description:
- I represents spermatogonia, the undifferentiated germ cells that divide to produce primary spermatocytes.
- II represents secondary spermatocytes, which are produced after the first meiotic division of primary spermatocytes.
- III represents spermatids, which are formed after the second meiotic division of secondary spermatocytes.
- IV represents spermatozoa, the fully mature sperm cells after spermiogenesis.
Step 3: Conclusion
The correct labelling of 'I', 'II', 'III', and 'IV' in the diagram is: Option (D): Spermatogonia, Secondary Spermatocyte, Spermatid, Spermatozoa.
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