🌿 class 12 biology · chapter 2
Human Reproduction
Human Reproduction is Chapter 2 of Class 12 CBSE Biology, worth around 9 marks of the 70-mark board paper. It's a moderate-difficulty chapter — plan roughly 4 hours to cover it properly. Recent CBSE papers asked 10 questions from it, on Oogenesis, Fertilisation, Spermatogenesis, Placenta. Examiner's note: Gametogenesis + menstrual cycle — diagrams score full marks.
Real board questions from this chapter
Describe the process of oogenesis in the human female. At what stages are the primary and secondary oocytes arrested, and what triggers the completion of each meiotic division?
Where does fertilisation normally occur in the human female? Explain the significance of the cortical reaction during fertilisation.
Describe the process of spermatogenesis in human males. Name the hormones that regulate it and state their roles.
Describe the structure of the placenta. List any three functions it performs during pregnancy, including one endocrine function.
Draw a labelled diagram of the sectional view of a human seminiferous tubule. Explain the roles of Sertoli cells and Leydig cells in spermatogenesis.
Explain the hormonal regulation of the menstrual cycle in human females, naming the hormones involved in each phase.
Differentiate between a morula and a blastocyst. What is the significance of the inner cell mass and the trophoblast?
Explain the role of gonadotropins (FSH and LH) in the regulation of spermatogenesis and in the ovarian cycle.
What is colostrum, and why is it important for a newborn infant?
Name the hormone whose surge causes ovulation in the human menstrual cycle. What happens to the corpus luteum if fertilisation does not occur?
Quick answers
How many marks is Human Reproduction worth in the Class 12 board exam?
Around 9 marks of the 70-mark CBSE Biology theory paper, based on the official unit-wise weightage. Gametogenesis + menstrual cycle — diagrams score full marks.
Is Human Reproduction easy or hard?
It's rated medium — a moderate-difficulty chapter in Class 12 Biology. Most students need about 4 hours to cover it well.
What should I focus on in Human Reproduction?
Going by the board papers themselves, the recurring areas are Oogenesis, Fertilisation, Spermatogenesis, Placenta, Male Reproductive System — that's where the marks actually sit.
What questions come from Human Reproduction in board exams?
Between 2018–2024, CBSE board papers asked questions from this chapter on Oogenesis, Fertilisation, Spermatogenesis, Placenta — 1- to 5-mark questions.
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