Key Points Summary — NEET High-Yield Points and PYQ Patterns — Summary

Most-tested single fact: Primary oocyte arrested at prophase I; secondary oocyte arrested at metaphase II; meiosis II completes only at fertilization.
Second most-tested: Fertilization site = ampulla of fallopian tube (NOT uterus, NOT isthmus).
Third most-tested: LH surge (NOT FSH) triggers ovulation on approximately day 14.
Common A/R pattern: "Both A and R true, R explains A" — used for parturition (oxytocin positive feedback), corpus luteum maintenance by hCG, oogenesis arrest.
Diagram traps: Identify middle piece = mitochondria; identify ampulla = fertilization; identify trophoblast = $\frac{placenta}{hCG}$ ; identify LH surge = sharpest peak at day 14.
Calculation questions: 1 primary oocyte → 1 ovum + 2–3 polar bodies; 1 primary spermatocyte → 4 spermatozoa.
Matching questions: FSH→Sertoli cells; LH→Leydig cells; LH→ovulation; hCG→corpus luteum maintenance; prolactin→milk production; oxytocin→milk ejection + uterine contractions.
Ploidy questions: spermatogonium = 2n; primary spermatocyte = 2n; secondary spermatocyte = n; spermatid = n; spermatozoon = n. Same pattern for oogenesis with arrest stages.
Percentage memory: Seminal vesicles = 60% (fructose); Prostate = 30% $\frac{alkaline}{citric acid}$ ; testes in scrotum = 2–3°C below body temp; spermatogenesis = 64 days.