Human Reproduction - CBSE Class XII, NCERT Biology Guide with Questions Bank


CBSE Board - Class XII, NCERT Biology Guide


(NCERT Biology Questions Bank for the Unit Human Reproduction, important for CBSE Board Exam, MBBS Entrance Exams of Medical Colleges and other Admission Tests)

Very Short Answer Type Hot Questions of 1 Mark

Question.1: In Human, is the sperm or egg responsible for the sex of the Embryo?
Question.2: Expand (i) ICSH (ii) FSH.
Question.3: What is rete-testis?
Question.4: What is Teratogen?
Question.5: What is parthenogenesis?
Question.6: Where are the sperm heads found embedded to survive after spermiogenesis?
Question.7: Why is ovum non-motile?
Question.8: How many eggs do you think were released by the ovary of a female dog, which gave birth to six puppies?
Question.9: During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring. Name the processes through which these events take place?
Question.10: Why are menstrual cycles absent during pregnancy?
Question.11: Name some extra embryonic membranes.
Question.12: Name the animal in which the process of budding is found.
Question.13: Why does corpus luteum secrete large quantity of progesterone during luteal phase of the menstrual cycle?


Short Answer Type Hot Questions of 2 - 3 Marks

Question.14: Mention the sites of action of the hormones GnRH and FSH during spermatogenesis in human males. Give one function of each of the hormones.
Question.15: Draw a diagram of T.S. of a part of seminiferous tubule of testis of an adult human male and label any four parts in it.
Question.16: The presence or absence of hymen is not an indication of virginity. Why?
Question.17: How is polyspermy prevented?

Click to Download Answers in pdf (Q.No.1-17)

(NCERT Biology Hot Questions important for CBSE Board Exam, Medical Entrance Examinations and other Admission Tests)


Long Answer Type CBSE Questions of 5 Marks
Question.18: Draw a labeled diagram of human sperm.
Question.19: State any two differences between spermatogenesis and oogenesis.
Question.20: Describe the structure and functions of male reproductive system.
Question.21: Give an account of the structure of human female reproductive system.

Click to Download Answers in pdf (Q.No.18-21)


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