CBSE Class 12th Biology Chapter 3 - Human Reproduction Important Questions with Answers

You should focus on solving CBSE Class 12th Biology Chapter 3: Human Reproduction important questions, especially to help you score high marks. By solving CBSE Class 12th Biology 3 questions, you will be solving exam-oriented questions only.

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CBSE Class 12th Biology Chapter 3 - Human Reproduction Important Questions with Answers are provided here in this article to help you in your eleventh hour exam preparation. The CBSE Class 12 Biology exam will be held on March 25, 2025 from 10:30 AM - 01:30 PM. Human reproduction in Class 12 Biology is the study of how humans reproduce sexually, from the formation of gametes to the birth of an offspring. Chapter 3, Human Reproduction focuses on the detailed anatomy and physiology of both male and female reproductive systems, including the formation of gametes (gametogenesis, sperms in males and ovum in females), the process of fertilization (fusion of male and female gametes (fertilisation) leading to formation of zygote), the menstrual cycle, pregnancy, the stages of embryonic development, particularly explaining how humans reproduce sexually. The important topics that are to be covered from this topic are external genitalia, Mammary glands, Gametogenesis, Spermatogenesis, Oogenesis, Insemination, Fertilization, Blastocyst development, Implantation, and Embryo development.

CBSE Class 12 Biology syllabus has five units and and 15 chapters. As per the Biology Class 12 Syllabus 2025 of CBSE Board, the Biology paper will be held for 100 marks. Out of the total 100 marks, 70 Marks will be given on theory paper and the remaining 30 Marks will be given on Practical.The practical exam is further divided into 4 parts. Students will be given marks for familiarity with the apparatus, written exam, practical, and viva. Human Reproduction is the third chapter of the Biology syllabus which is a part of Unit VI, Reproduction. There are all total 3 chapters in Unit VI, and the whole unit will carry 16 marks in the exam. Prepare thoroughly with the most important questions of CBSE Class 12th Biology Chapter 3 - Human Reproduction. You can first cover the CBSE Class 12th Biology syllabus to understand the key topics and then start solving the CBSE Class 12th Biology Chapter 3 - Human Reproduction Important Question to get a better understanding of your preparation level. Start practicing now.

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Draw a labelled diagram to show inter-relationship of four accessory ducts in a human male reproductive system. (Delhi 2019)

Question 2.

Draw a sectional view of human ovary showing the different stages of developing follicles, corpus luteum and ovulation. (Delhi 2019)
Or
(i) Draw a sectional view of human ovary and label the following parts
(a) Primary follicle
(b) Secondary oocyte
(c) Graafian follicle
(d) Corpus luteum
(ii) Name the hormones influencing follicular development of corpus luteum. (All India 2019)

Question 3.

State from where do the signals for parturition originate in human females. (All India 2019)

Question 4.

(i) Explain the process of fertilisation in human.
(ii) Name the embryonic stage that gets implanted in human females. Explain the process of implantation. (Delhi 2019)

Question 5.

(i) Explain menstrual cycle in human females.
(ii) How can the scientific understanding of the menstrual cycle of human females help as a contraceptive measure ? (2018)

Question 6.

Draw a labelled diagrammatic sectional view of a human seminiferous tubule. (Delhi 2017)

Question 7.

(i) Arrange the following hormones in the sequence of their secretion in a pregnant woman. hCG, LH, FSH, Relaxin
(ii) Mention their source and the function they perform. (Delhi 2017)

Question 8.

(i) Explain the following phases in the menstrual cycle of a human female.
(a) Menstrual phase
(b) Follicular phase
(c) Luteal phase
(ii) A proper understanding of menstrual cycle can help immensely in family planning. Do you agree with the statement? Provide reasons for your answer. (All India 2017)

Question 9.

(i) How many primary follicles are left in each ovary in a human female at puberty?
(ii) Draw a sectional view of the ovary showing the different follicular stages of a human female in her preovulatory phase of menstrual cycle. (Outside Delhi 2016C)

Question 10.

Why is breastfeeding recommended during the initial period of an infant’s growth? Give reasons. (Delhi 2016)
Or
(i) Why is mother’s milk considered very essential for the healthy growth of infants?
(ii) What is the milk called that is produced in the initial days of lactation? (All India 2016)

Question 1.

Explain the role of pituitary and sex hormones in the process of spermatogenesis. (All India 2015C)
Or
Spermatogenesis in human males is a hormone regulated process. Justify. (Delhi 2014)
Or
Explain the hormonal regulation of the process of spermatogenesis in humans. (All India 2013)

Question 2.

What happens to corpus luteum in human female if the ovum is (i) fertilised, (ii) not fertilised? (Delhi 2015)
Or
Mention the fate of corpus luteum and its effect on the uterus in the absence of fertilisation of the ovum in human female. (Foreign 2010)

Question 3.

Draw a diagram of a mature human sperm. Label any three parts and write their functions.
Or
Draw a labelled diagram of a human sperm. (Foreign 2015, 2011)
Or
Draw a diagram of human sperm. Label only those parts along with their functions that assist the sperm to reach and gain entry into the female gamete. Foreign 2014

Question 4.

Explain the events in a normal woman during her menstrual cycle on the following days (Delhi 2015C)
(i) Ovarian event from 13-15 days.
(ii) Ovarian hormones level from 16-23 days.
(iii) Uterine events from 24-29 days.

Question 5.

Explain the events in a normal woman during her menstrual cycle on the following days (All India 2015C, Outside Delhi 2015C)
(i) Pituitary hormone levels from 12 days.
(ii) Uterine events from 13-15 days.
(iii) Ovarian events from 16-23 days.

Question 6.

Describe the roles of pituitary and ovarian hormones during the menstrual cycle in a human female. (Delhi 2015)
Or
Explain the ovarian and uterine events that occur during a menstrual cycle in a human female under the influence of pituitary and ovarian hormones, respectively. (Delhi 2014)
Or
Explain the different phases of menstrual cycle and correlate the phases with the different levels of pituitary hormones in a human female. (Delhi 2014C)
Or
With the help of graphical illustration only, show the changes in the levels of the pituitary hormone during menstrual cycle in humans. (Delhi 2011C)

Question 7.

Explain the development of a secondary oocyte (ovum) in a human female from the embryonic stage up to its ovulation. Name the hormones involved in this process. (Delhi 2015)
Or
When and where are primary oocytes formed in a human female? Trace the development of these oocytes till ovulation (in menstrual cycle). How do gonadotropins influence this developmental process? (Delhi 2010)

Question 8.

Mention the function of zona pellucida. (Delhi 2015C, 2013)

Question 9.

Describe the process of parturition in human. (Delhi 2015)

Question 10.

During the reproductive cycle of a human female when, where and how does placenta develop? What is the function of placenta during pregnancy and embryo development? (Delhi 2015)