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Mind Map: Human Reproduction
The document Mind Map: Human Reproduction is a part of the NEET Course Biology Class 12.
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FAQs on Mind Map: Human Reproduction
| 1. What are the main stages of gametogenesis and how do spermatogenesis and oogenesis differ? |  |
Ans. Gametogenesis produces sex cells through two distinct processes: spermatogenesis in males generates four functional sperm from one diploid cell, while oogenesis in females produces one ovum and polar bodies. Both involve meiosis but differ in timing, location, and output. Spermatogenesis occurs continuously in seminiferous tubules after puberty; oogenesis begins before birth and completes cyclically. Understanding these reproductive processes is essential for NEET Biology Class 12.
| 2. How does the menstrual cycle work and what hormones regulate it? | |
Ans. The menstrual cycle spans approximately 28 days, controlled by four key hormones: FSH and LH from the pituitary gland, and oestrogen and progesterone from ovaries. FSH stimulates follicle development during the follicular phase; LH surge triggers ovulation; progesterone dominates the luteal phase. When fertilisation fails, hormone withdrawal causes menstruation. These hormonal fluctuations regulate the entire female reproductive cycle systematically.
| 3. What's the difference between mitosis in spermatogenesis versus the role of meiosis in creating genetic diversity? | |
Ans. Mitosis produces genetically identical spermatids during spermatogenesis, maintaining chromosome number. Meiosis, occurring in both male and female gametogenesis, halves chromosome number and creates genetic variation through crossing over and independent assortment. This distinction ensures sperm diversity while preserving somatic cell identity. Meiosis generates four haploid gametes from each diploid germ cell, fundamental to human reproduction.
| 4. Why does the corpus luteum persist after ovulation and what happens if fertilisation doesn't occur? | |
Ans. After ovulation, the corpus luteum forms from follicle remnants and secretes progesterone to maintain the uterine lining for implantation. Without fertilisation, hCG levels drop, luteal cells degenerate, progesterone declines, and the endometrium sheds during menstruation. This cyclical pattern repeats monthly. If conception occurs, hCG maintains the corpus luteum, sustaining pregnancy hormones until placental takeover.
| 5. What are the structural and functional differences between the seminiferous tubules and the ovarian follicles in human reproduction? | |
Ans. Seminiferous tubules in testes are coiled structures lined with spermatogenic cells producing sperm continuously throughout adult life. Ovarian follicles contain oocytes surrounded by follicle cells, developing cyclically from primordial to mature Graafian follicles monthly. Seminiferous tubules emphasise continuous mass production; follicles prioritise singular gamete maturation. Both structures support gametogenesis but operate on fundamentally different temporal and numerical scales for reproductive success.
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Document Description: Mind Map: Human Reproduction for NEET 2026 is part of Biology Class 12 preparation. The notes and questions for Mind Map: Human Reproduction have been prepared according to the NEET exam syllabus. Information about Mind Map: Human Reproduction covers topics like and Mind Map: Human Reproduction Example, for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Mind Map: Human Reproduction.
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