Human Reproduction
CBSE Class 12 Biology · 89 board questions from this chapter; 88 listed below, 2023–2026
- Foetal ejection reflex in human female triggers the release of which hormone?2026
- Identify the parts P, Q, R, S in the figure given below and select the option in the correct order.2026
- Which of the following groups of cells in the male gonad represent haploid cells?2026
- The foetal ejection reflex in human triggers the release of hormone from. Fill in the blanks by choosing right option.2026
- Select the phase of menstrual cycle in which the remaining parts of Graafian follicle transform into the corpus luteum.2026
- During different phases of menstrual cycle, hormones are secreted. Choose the option showing the correct sequence of hormones.2026
- A female undergoing IVF treatment has blocked fallopian tube. The technique by which the embryo with more than 8 blastomeres will…2026
- Select the option that shows correct statements: (i) Corpus luteum secretes progesterone. (ii) Only FSH attains a peak level in…2026
- The features of some structures of human male reproductive system are given below. Choose the correct option that matches the…2026
- The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?2026
- If a sperm nucleus is injected into an oocyte then all of the following events are bypassed except -2026
- In a human female, menstrual cycle of 28 days is represented by the diagram given below. Select the correct statement related…2026
- Which connective tissue connects ovary to pelvic wall and uterus?2026
- Assertion: After implantation, finger-like projections appear on the trophoblast called chorionic villi. Reason (R): Chorionic…2026
- Assertion: The embryo with 8 to 16 blastomeres is called a morula. Reason (R): The morula continues to divide and transform into…2026
- Assertion: The endometrium undergoes cyclic changes during the menstrual cycle. Reason (R): Perimetrium contracts strongly during…2026
- Mention the sites of action of the hormones 'GnRH' and 'FSH' during spermatogenesis. Write one function of each of these hormones.2026
- Draw a labelled diagram of the embryonic stage that gets implanted in the human uterus. State the functions of two labelled parts.2026
- (i) How does a farmer use dormancy of seed to his advantage? (ii) Differentiate between pea seed and castor seed. OR Identify the…2026
- (i) Name the organ that forms a connection between foetus and the uterus of a pregnant human female. (ii) How does it support…2026
- Draw a sectional view of seminiferous tubule of a human. Label the following cells in the seminiferous tubule: (i) Cells that…2026
- Draw a diagram of human ovum prior to fertilization. Label any four parts. Explain how polyspermy is avoided during fertilization.2026
- Give the schematic representation of oogenesis in human female. Indicate chromosome number also.2026
- In the given diagram - 'A' is an embryonic stage that gets transformed into 'B', which in turn gets implanted in the endometrium…2026
- Briefly explain the events of fertilisation and implantation in an adult human female. OR (i) Arrange the following hormones in…2026
- Trace the events from fertilization till implantation of blastocyst in human female. Also mention the site where fertilization…2026
- (i) Draw a neat sectional view of seminiferous tubule of a human testes showing spermatogenesis. Label any five stages. (ii)…2026
- Oogenesis is a discontinuous process that begins before birth and is completed after puberty. (i) Trace the development of a…2026
- Given below are few statements with reference to the uterus in the female reproductive system: (i) The myometrium exhibits strong…2025
- Given below are few statements with reference to the ovaries of the human female reproductive system: (i) It is 2-4 cm in length…2025
- Given below are few statements with reference to oogenesis in a human female: (i) An unequal division of the primary oocyte forms…2025
- Given below is the schematic representation of spermatogenesis in human males: Choose the option that shows the correct labelling…2025
- Given below are a few statements with reference to the accessory ducts of the human male reproductive system: (i) The…2025
- Given below are few statements with respect to the process of oogenesis in a human ovary: (i) Each granulosa cell gets surrounded…2025
- Menstrual cycle in human females consists of various events. Select the option that indicates the correct sequence of these…2025
- Penetration of the sperm in the ovum is followed by:2025
- During the process of oogenesis in human female, the primary oocyte results in the formation of which of the following? Choose…2025
- Colostrum secreted by the mother's mammary glands in a human female during the initial days of lactation is rich in antibody:2025
- Given below are few statements with reference to the human male reproductive system. (i) Paired seminal vesicles, prostate gland…2025
- Given below are a few statements with reference to the human sperm. (i) Sperm head contains a large nucleus and a lot of…2025
- The large bean-shaped organ acting as a filter of the blood in humans is:2025
- Given below are a few statements with respect to spermatogenesis in a human male. (i) Sperms are released from the seminiferous…2025
- Match the following items of Column-I with that of Column-II: Choose the option that matches Column-I with Column-II correctly.2025
- Assertion: Corpus luteum secretes the hormone, progesterone. Reason (R): Hormone Progesterone is essential for maintenance of the…2025
- Assertion: The mammary glands secrete milk for the nourishment of the young ones. Reason (R): These are modified sweat glands.2025
- Student to attempt either option or. (i) Identify 'P' and 'Q' labelled in the diagram. (ii) Specify the source of the hormone 'P'…2025
- "A fully developed foetus initiates its delivery from the mother's womb." Explain. OR Give reasons for the following: (i) Why can…2025
- (i) Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the…2025
- (i) Write the function of each of the following: (I) Seminal Plasma (II) Acrosome of human sperm (ii) Differentiate between…2025
- Explain the neuroendocrine mechanism involved in the process of parturition in a human female leading to the expulsion of the…2025
- Explain the process of formation of placenta in a human female after the implantation of the blastocyst in the endometrium of the…2025
- Name and explain the role of inner and middle walls of the human female uterus. Write the location and function of fimbriae in…2025
- Study the graphs given below for Case 1 and Case 2 showing different levels of certain hormones and answer the question that…2025
- Student to attempt either option or. (i) Describe the process of megasporogenesis in an angiosperm. (ii) Draw a diagram of a…2025
- Student to attempt either option or. (i) Give a schematic representation of oogenesis in human females. (ii) Mention the number…2025
- Student to attempt either option or. (i) Draw a diagrammatic sectional view of human seminiferous tubule (enlarged) and label the…2025
- Study the given diagram showing the sectional view of a seminiferous tubule. Answer the following questions: (i) Label A, B, C…2025
- Select the option that has the correct sequence of events of human female reproductive cycle: (i) Secretion of FSH (ii) Ovulation…2024
- Which one of the following hormones is secreted by the human placenta that helps in the maintenance of pregnancy?2024
- Select the option that gives the correct identification of ovum, morula and blastocyst in a human female reproduction system as…2024
- In the absence of fertilization, corpus luteum:2024
- Study the graph given below that represents the changes in the thickening of the uterine wall in women 'X' and women 'Y' over a…2024
- State the procedure followed in the technique of amniocentesis. List any two advantages of this technique.2024
- Draw a diagram of a human sperm. Label the following parts in it: (i) Which helps in the motility of the sperm (ii) Which helps…2024
- Differentiate between spermatogenesis and oogenesis in humans on the basis of the following: When the process is initiated.…2024
- Read the following passage and answer the questions that follow. Spermatogenesis is an important primary sex characteristic in…2024
- In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age of the female. Study the…2024
- (i) Explain any four devices that flowering plants have developed to encourage cross-pollination. (ii) Why do plants discourage…2024
- The given diagram shows the sectional view of a seminiferous tubule of Human testis: (i) Name and describe the process depicted…2024
- (i) Draw a labelled diagram of the embryonic stage that gets implanted in the human female leading to pregnancy. 1 1/2 (ii)…2024
- (i) Explain the following phases in the menstrual cycle of a human female: (1) Menstruation (2) Follicular phase (3) Luteal phase…2024
- (i) Explain the development of male gametophyte in an angiosperm. (ii) Draw a labelled diagram of a three-celled male…2024
- (i) Describe the events of spermatogenesis with the help of a A schematic diagram. (ii) Explain the role of hormones in…2024
- (i) State the objective of adopting artificial hybridisation programme in plants. (ii) Describe the steps followed in this…2024
- A human ovum completes its second meiosis:2023
- Observe the following line diagram depicting the 28 days menstrual cycle of a healthy young woman. Select the option of days on…2023
- Which of the following options correctly matches the name of the hormone to its site of production in the human body?2023
- Given below are structural details of a human mammary gland: 1 (i) The glandular tissue in the breast has 15-20 clusters of cells…2023
- Which of the following hormones are active during the ovulatory phase of menstrual cycle in a normal human female?2023
- In which one of the following options does the endocrine gland correctly match with its hormonal secretion and its function?2023
- Which of the following hormones is not secreted by the human placenta?2023
- Assertion: Breast-feeding is advised by the doctor as it is essential for the new borns. Reason (R): Colostrum secreted by the…2023
- The graph given below shows the number of primordial follicles per ovary in women at different ages. Study the graph and answer…2023
- The diagram given below shows a developmental stage of human embryo. Answer the following questions with reference to it:…2023
- The diagram given below shows the events occurring in an ovary during Oogenesis in a human female. Identify 'X'. Mention the time…2023
- Given below is a diagrammatic sectional view of a seminiferous tubule. State the developmental process of: (i) 'b' from 'a'. (ii)…2023
- Trace the journey of a zygote from the isthmus of the fallopian tube up to its implantation in the uterus of a human female.…2023
- (i) When and how does foetal ejection reflex begin? (ii) Pituitary gland and uterine muscles play an important role during…2023
Answers come from CBSE’s own marking schemes. How we source them.