Human Reproduction
119 CBSE Class 12 Biology past-year questions from 4 papers, 2023 to 2026, with answers and worked solutions.
- Difficulty: 37 easy · 57 moderate · 25 hard.
- Most-asked subtopics: Menstrual Cycle (34), Gametogenesis (30), Fertilisation and Implantation (20).
- Updated 8 October 2026.
#1The Male Reproductive System
#2The Male Reproductive System
#3The Male Reproductive System
#4The Male Reproductive System
#5The Male Reproductive System
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#6The Male Reproductive System
#7The Male Reproductive System
#8The Male Reproductive System
Spermatogenesis is an important primary sex characteristic in humans and all other vertebrates. The process is coordinated and controlled under the influence of hormones. It starts with the onset of puberty in humans and thereafter continues. The primordial cells within the embryonic testis which differentiate into spermatogonia are the precursors of the sperms. These are located at the outer walls of the seminiferous tubules where the process of spermatogenesis proceeds.#9The Male Reproductive System
#10The Female Reproductive System
For Questions number 13 to 16, two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (A), (B), (C) and (D) as given below.#11The Female Reproductive System
#12The Female Reproductive System
For Questions number 13 to 16 two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Answer these questions by selecting the appropriate option given below :#13The Female Reproductive System
#14The Female Reproductive System
#15The Female Reproductive System
#16The Female Reproductive System
#17The Female Reproductive System
#18Gametogenesis
#19Gametogenesis
#20Gametogenesis
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#35Gametogenesis
#36Gametogenesis
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#38Gametogenesis
#39Gametogenesis
#40Gametogenesis
#41Gametogenesis
#42Gametogenesis
Spermatogenesis is an important primary sex characteristic in humans and all other vertebrates. The process is coordinated and controlled under the influence of hormones. It starts with the onset of puberty in humans and thereafter continues. The primordial cells within the embryonic testis which differentiate into spermatogonia are the precursors of the sperms. These are located at the outer walls of the seminiferous tubules where the process of spermatogenesis proceeds.#43Gametogenesis
Spermatogenesis is an important primary sex characteristic in humans and all other vertebrates. The process is coordinated and controlled under the influence of hormones. It starts with the onset of puberty in humans and thereafter continues. The primordial cells within the embryonic testis which differentiate into spermatogonia are the precursors of the sperms. These are located at the outer walls of the seminiferous tubules where the process of spermatogenesis proceeds.#44Gametogenesis
Spermatogenesis is an important primary sex characteristic in humans and all other vertebrates. The process is coordinated and controlled under the influence of hormones. It starts with the onset of puberty in humans and thereafter continues. The primordial cells within the embryonic testis which differentiate into spermatogonia are the precursors of the sperms. These are located at the outer walls of the seminiferous tubules where the process of spermatogenesis proceeds.#45Gametogenesis
#46Gametogenesis
#47Gametogenesis
#48Menstrual Cycle
#49Menstrual Cycle
#50Menstrual Cycle
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