Chapter 2: Human Reproduction — Online MCQ Test
BIOLOGY · Grade 12 · CBSE(NCERT)
Practice Chapter 2: Human Reproduction with a free chapter-wise online MCQ test.
This chapter covers: Male Reproductive System Female Reproductive System Spermatogenesis Oogenesis Menstrual Cycle Fertilisation Implantation Pregnancy Lactation Embryonic Development Hormones.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 2: Human Reproduction — Important Questions & Answers
Which of the following is NOT a part of the male reproductive system?
- A. Testis
- B. Prostate gland
- C. Ovary
- D. Epididymis
Answer: C. Ovary
Ovary is a female reproductive organ. The male reproductive system consists of testes, epididymis, vas deferens, seminal vesicles, prostate gland, and penis.
Ovary is a female reproductive organ. The male reproductive system consists of testes, epididymis, vas deferens, seminal vesicles, prostate gland, and penis.
The process of formation of sperms from spermatogonial cells is called _______.
- A. Oogenesis
- B. Spermatogenesis
- C. Gametogenesis
- D. Spermiogenesis
Answer: B. Spermatogenesis
Spermatogenesis is the process of sperm formation from spermatogonial stem cells in the seminiferous tubules of the testis.
Spermatogenesis is the process of sperm formation from spermatogonial stem cells in the seminiferous tubules of the testis.
How many functional sperms are produced from one spermatogonium after complete spermatogenesis?
- A. One
- B. Two
- C. Three
- D. Four
Answer: D. Four
One spermatogonium (diploid cell) undergoes meiosis to produce four functional haploid sperms.
One spermatogonium (diploid cell) undergoes meiosis to produce four functional haploid sperms.
Which hormone is responsible for the development of secondary sexual characteristics in males?
- A. Estrogen
- B. Testosterone
- C. Progesterone
- D. FSH
Answer: B. Testosterone
Testosterone, secreted by Leydig cells in the testis, is responsible for male secondary sexual characteristics like facial hair, deepening of voice, and muscle development.
Testosterone, secreted by Leydig cells in the testis, is responsible for male secondary sexual characteristics like facial hair, deepening of voice, and muscle development.
A primary oocyte is arrested at which stage of meiosis?
- A. Prophase I
- B. Metaphase I
- C. Anaphase I
- D. Telophase I
Answer: A. Prophase I
Primary oocytes are arrested in prophase I of meiosis I and remain in this state until ovulation occurs.
Primary oocytes are arrested in prophase I of meiosis I and remain in this state until ovulation occurs.
How many secondary oocytes are produced from one oogonium during oogenesis?
- A. One
- B. Two
- C. Three
- D. Four
Answer: A. One
One oogonium produces only one functional ovum (secondary oocyte) and three polar bodies, unlike spermatogenesis which produces four functional gametes.
One oogonium produces only one functional ovum (secondary oocyte) and three polar bodies, unlike spermatogenesis which produces four functional gametes.
Which is NOT a component of seminal plasma?
- A. Fructose from seminal vesicles
- B. Alkaline fluid from prostate gland
- C. Mucus from bulbourethral gland
- D. Mitochondria from sperm tail
Answer: D. Mitochondria from sperm tail
Mitochondria are part of the sperm cell itself, not seminal plasma. Seminal plasma is composed of secretions from seminal vesicles, prostate gland, and bulbourethral glands.
Mitochondria are part of the sperm cell itself, not seminal plasma. Seminal plasma is composed of secretions from seminal vesicles, prostate gland, and bulbourethral glands.
During which stage of spermatogenesis does the haploid cell begin to develop the flagellum and reduce its cytoplasm?
- A. Mitotic division of spermatogonium
- B. Meiosis I of primary spermatocyte
- C. Meiosis II of secondary spermatocyte
- D. Spermiogenesis of spermatid
Answer: D. Spermiogenesis of spermatid
Spermiogenesis is the final differentiation stage where spermatids transform into mature spermatozoa by developing flagellum, acrosome, and mitochondrial sheath while reducing cytoplasm.
Spermiogenesis is the final differentiation stage where spermatids transform into mature spermatozoa by developing flagellum, acrosome, and mitochondrial sheath while reducing cytoplasm.
Which combination of hormonal changes would indicate the luteal phase of the menstrual cycle?
- A. Low progesterone, high FSH, low LH
- B. High progesterone, low FSH, low LH
- C. High estrogen, high FSH, high LH
- D. Low estrogen, low progesterone, high FSH
Answer: B. High progesterone, low FSH, low LH
During the luteal phase, the corpus luteum secretes high progesterone while FSH and LH levels are suppressed by negative feedback.
During the luteal phase, the corpus luteum secretes high progesterone while FSH and LH levels are suppressed by negative feedback.
A woman experiences ectopic pregnancy (implantation in fallopian tube). Why would this condition be life-threatening and prevent normal development?
- A. The fallopian tube cannot produce enough progesterone
- B. The fallopian tube lacks sufficient endometrium for implantation and cannot support fetal growth
- C. Sperm cannot reach the ectopic embryo
- D. The fallopian tube produces toxic substances for the embryo
Answer: B. The fallopian tube lacks sufficient endometrium for implantation and cannot support fetal growth
The fallopian tube lacks the specialized endometrial tissue and nutrient supply needed for proper implantation and fetal development, causing rupture and maternal hemorrhage.
The fallopian tube lacks the specialized endometrial tissue and nutrient supply needed for proper implantation and fetal development, causing rupture and maternal hemorrhage.