Human Reproduction: Class 12 Previous Year Questions

Human Reproduction questions asked in CBSE board exams

Repeated questions first. Open the free app to see each question as it appeared in the paper, with its marking scheme.

1. (a) (i) Name the organ that forms a connection between foetus and the uterus of a pregnant human female. ½ (ii) How does it support both nutrition and hormonal regulation ? 1½ OR (b) Give reasons for : (i) All copulations do not lead to pregnancy. 1 (ii) Meios…
   Board 20262 marksshort answer
2. Select the option that shows correct statements : 1 (i) Corpus luteum secretes progesterone. (ii) Only FSH attains a peak level in middle of cycle. (iii) LH surge induces rupture of graafian follicle. (iv) Luteal phase of menstrual cycle is also called prolife…
   Board 20261 markMCQ
3. Match the following items of Column-I with that of Column-II : Column-I Column-I (a) Trophoblast (i) Embedding of blastocyst in the endometrium (b) Implantation (ii) Group of cells that would differentiate as embryo (c) Inner cell mass ( (ii) Embryo with 8-16 …
   Board 20251 markMCQ
4. (a) (i) Explain the development of male gametophyte in an angiosperm. 2 2 1 (ii) Draw a labelled diagram of a three-celled male gametophyte. 2 2 1 OR (b) (i) Draw a diagrammatic sectional view of ovary of human female and label the following : 2 (1) Blood vess…
   Board 20245 markslong answer
5. (a) Stability, as one of the properties of genetic material, was very evident in one of the very early experiments in genetics. Name the scientist and describe his experiment. State the conclusion he arrived at. 5 OR (b) A tall pea plant bearing violet flowers…
   Board 20245 markslong answer
6. Read the following passage and answer the questions that follow. 4 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 ons…
   Board 20244 markscase-based
7. Explain the mode of action of contraceptive pills taken by human females. Mention the schedule to be followed for effective outcome.
   Board 20243 marksshort answer
8. Identify A, B, C and D in the table given below : 4 2 1 =2 Terms Part of the plant it represents Pericarp Cotyledon in seed of grass family Embryonal axis Remains of nucellus in a seed
   Board 20242 marksshort answer
9. Which one of the following hormones is secreted by the human placenta that helps in the maintenance of pregnancy ? (A) Relaxin (B) Human Chorionic Gonadotropin (C) Oxytocin (D) Human Placental Lactogen 4 3. n[adma {Z`moOZ hoVw {H$gr Xån{V Ûmam AnZmB© OmZo dmbr…
   Board 20241 markMCQ
10. The periodic abstinence by a couple for family planning should be from : (A) Day 5 to 10 of menstrual cycle (B) Day 13 to 15 of menstrual cycle (C) Day 10 to 17 of menstrual cycle (D) Day 16 to 20 of menstrual cycle
    Board 20241 markMCQ
11. An angiosperm embryo sac is located within the : (A) Placenta (B) Megasporangium (C) Nucellus (D) Ovary 4 2. ñV§^ I H$s _Xm| H$m {_bmZ ñV§^ II go H$s{OE Am¡a ZrMo {XE JE {dH$ënm| _| go ghr gw_o{bV {dH$ën H$m M`Z H$s{OE : I II 1. _|S>br` EH$g§H$a (_moZmohmB{~«S…
    Board 20241 markMCQ
12. The diagram given below shows a developmental stage of human embryo. Answer the following questions with reference to it : (a) Identify and name the human embryonic stage shown. (b) Mention its exact location in the normal pregnancy of a woman. (c) Write one f…
    Board 20232 marksshort answer
13. JJJJ Page 11 10. In which one of the following options does the endocrine gland correctly match with its hormonal secretion and its function ? Endocrine Gland Hormone Function (a) Sertoli cells Testosterone Development of secondary sexual characteristics (b) P…
    Board 20231 markMCQ
14. Two statements are given - one labeled Assertion (A) and the other labeled Reason (R). Assertion: Apomictic fruits are seedless. Reason: Apomictic fruits are formed without fertilisation. Which of the following is correct? A. Both A and R are true, and R is th…
    CBSE practice 2021-221 markAssertion-Reason
15. Angiosperms such as pea plants undergo double fertilisation. The male gametophyte has a simple structure while the female gametophyte has a much more complex structure with multiple supporting cells in it. (a) What is/are the product/s of double fertilisation?…
    CBSE practice 2022-235 markslong answer
16. (a) Explain why non-occurrence of menstrual cycle could be indicative of pregnancy. (b) The menstrual cycle can be divided into 4 phases: menstrual phase, follicular 3 phase, ovulation phase, luteal phase. During the follicular phase, hormones like FSH and LH …
    CBSE practice 2022-233 marksshort answer
17. The figure below shows the sequence of changes within the ovary that occur during the menstrual cycle. a) Name the process A. Name the hormone that plays an important role during this event. b) Identify B and name the hormone that regulates the maturation of B…
    CBSE practice 2023-243 marksshort answer
18. Kavya says that the placenta produces relaxin which plays a crucial role during pregnancy. (a) Is she correct? Justify. (b) Name TWO other hormones secreted by the placenta during pregnancy
    CBSE practice 2023-242 marksshort answer
19. In some species of flowering plants, fruits develop without the process of fertilisation. Which of these can be an identifying factor of such fruits? A. They are not developed from the ovary. B. They are always composite. C. They are always seedless. D. They a…
    CBSE practice 2021-221 markMCQ
20. Shown here is how the levels of hormones Estrogen and Progesterone change during the menstrual cycle. Which of these correctly shows how the levels of Luteinizing hormone (LH) and Follicle-stimulating hormone (FSH) change during the same cycle? A. B. C. D.
    CBSE practice 2021-221 markMCQ

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