Cue Column | Notes Column
| Cue | Notes |
|---|---|
| Start cell | Spermatogonium (2n) — in basal compartment of seminiferous tubule |
| Step 1 | Spermatogonium → mitotic divisions → Primary spermatocyte (2n) |
| Step 2 | Primary spermatocyte → Meiosis I → 2× Secondary spermatocyte (n) |
| Step 3 | Secondary spermatocyte → Meiosis II → 2× Spermatid (n) each |
| Step 4 | Spermatid → Spermiogenesis → Spermatozoon (n) |
| Products | 1 spermatogonium → 4 functional spermatozoa |
| Duration | ~64 days total |
| Key distinction | Spermiogenesis = morphological transformation (no division) |
Summary
Four haploid spermatozoa are produced from one diploid spermatogonium. The 64-day timeline and the 4:1 ratio (spermatogonium:spermatozoa) are critical NEET facts.