Please refer to Assignments Class 12 Biology Human Reproduction Chapter 3 with solved questions and answers. We have provided Class 12 Biology Assignments for all chapters on our website. These problems and solutions for Chapter 3 Human Reproduction Class 12 Biology have been prepared as per the latest syllabus and books issued for the current academic year. Learn these solved important questions to get more marks in your class tests and examinations.
Human Reproduction Assignments Class 12 Biology
Question. Which of the following method of contraception is highly effective but having poor reversibility :
(b) Oral pills
(d) Barrier methods
Question. The base of the sertoli cells adhere to the basal lamina and their apical ends frequently expand into the ____ of the seminiferous tubules.
(c) Outer membrane
(d) Inner layer
Question. Which of the following statements is correct :
(a) MTP has a significant role in decreasing the population.
(b) Goverment of India legalised MTP in 1971 with some strict conditions.
(c) MTP is relatively safe during the first trimester.
(d) All the above
Question. In humans which of the following undergoes meiosis II ?
(a) Second polar body
(c) Secondary oocyte
(d) Both (1) and (3)
Question. Which of the following statements is correct ?
(a) Hormone releasing I.U.D. make uterus unsuitable for implantation
(b) IUD are ideal contraceptives for the female who want to delay pregnancy
(c) IUD is most widely accepted method of contraception in India.
(d) All the above
Question. In which of the following methods zygotes or early embryo upto 8 blastomeres could be transferred into the fallopian tube ?
Question. Intra testicular genital duct system includes :
(a) Tubuli recti, rete testis and ductuli efferentes
(b) Tubuli recti, vas deferens and ejaculatory duct
(c) Urethra, epididymis and Tubuli recti
(d) Seminal vesicle, ejaculatory duct and ampulla
Question. Find out ‘A’ and ‘B’ respectively :
(a) Uterus, Ovary
(b) Ovary, Uterus
(c) Oviduct, Ovary
(d) Seminal vesicle, Uterus
Question. Which of the following can be used as an emergency contraceptives to avoid possible pregnancy :
(b) IUD within 72 hours
(d) 1 and 2
Question. During the first two months of pregnancy the basic structures are formed. During this period, the developing stage is called as :
Question. Which is not correct about amnion ?
(a) It acts as a shock absorber
(b) It provides a fluid medium to the developing embryo.
(c) It takes part in the formation of human placenta
(d) None of the above
Question. Which of the following statement is not correct ?
(a) Cleavage divisions are rapid
(b) Cleavage divisions are asynchronous
(c) Cleavage divisions are repeated mitotic divisions.
(d) Approximately one month after fertilisation, the blastocyst embedded itself in the thickened wall of the uterus.
Question. Which of the following set is correct ?
(a) Ovarian follicle – Estrogen
(b) Corpus luteum – Progesterone & Estrogen
(c) Placenta – HCG hormone
(d) All of the above
Question. Which pair is correct ?
(a) Progesterone ® Steroid Estrogen ® Protein
(b) Progesterone & Estrogen ® Protein
(c) Progesterone & Estrogen ® Steroid
(d) Progesterone ® Protein Estrogen ® Steroid
Question. Which of the following method of contraception is effective only upto a maximum period of six months following parturition ?
(a) Cortus interruptus
(b) Lactational amenorrhea
(c) Periodic abstinance
Question. Which of the following are included in barrier method ?
(c) Cervical caps and vault
(d) All of the above
Question. Zona pellucida is synthesised by :
(a) Follicle cells
(c) Both follicle cells and Oocyte
(d) Granulosa cells
Question. Which of the following statements is correct forSaheli ?
(a) It is weekly pill.
(b) It has high contraceptive value
(c) It has nonsteroidal preparation
(d) All the above
Question. Corpus luteum is formed by :
(a) Granulosa cells
(b) Interstitial cells
(c) Follicle cells + Granulosa cells
(d) Granulosa cells + Theca cells
Question. Couple unable to produce children inspite of unprotected sexual co-habitation is termed as :
Question. The head of sperm contains the nucleus having a haploid set of chromosomes in a :
(a) Compact and inactive state
(b) Compact and active state
(c) Rare and inactive state
(d) Rare and active state
Question. Placenta acts as a/an :
(b) Endocrine gland
(c) Both (1) and (2)
(d) None of above
Question. Infertility cases due to inability of male partner to inseminate the female corrected by :
(c) Artificial insemination
Question. The enlarged end of penis is covered by a loose fold of skin is called.
(a) glans penis
(d) urethral meatus
Question. Vasa efferentia are the ductules leading from
(a) epididymis to urethra.
(b) vas deferens to epididymis.
(c) rete testis to vas deferens.
(d) testicular lobules to rete testis.
Question. Which of the following is a finger like structure and lies at the upper junction of the two labia minora above the urethral opening?
(d) Chorionic villi
Question. In the process of spermatogenesis, first maturation division is called _______.
(a) mitotic division
(b) reduction division
(c) amitotic division
(d) None of the these
Question. In humans, male germs cells differentiate into _____ at the end of first meiotic division.
(c) secondary spermatocyte
(d) primary spermatocyte
Question. After birth, colostrum is released from mammary glands which is rich in
(a) fat and low in proteins
(b) proteins and low in fat
(c) proteins, antibodies and low in fat
(d) proteins, fat and low in antibodies
Question. Semen is a constituent of seminal plasma with _______.
Question. Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
(b) Polar body
(c) Corpus luteum
(d) Secondary oocytes
Question. Which of the following contains a fluid filled cavity called antrum?
(a) Primary spermatocyte.
(b) Primary follicle of ovary.
(c) Tertiary follicle of ovary.
(d) Secondary spermatocyte.
Question. Level of which hormones are at their highest during the luteal phase (second half of the cycle) of the menstrual cycle?
(c) Luteinizing hormone
(d) Follicular stimulating hormone
Question. Which phase of menstrual cycle is also called secretory phase?
Question. When semen is released by the penis into the vagina during copulation, then it is called _____.
Question. Fusion of haploid nucleus of sperm and that of ovum lead to the formation of _______.
Question. Trophoblast and inner cell mass are the arrangements of blastomeres as outer and inner layers respectively in _______.
Question. Presence of XX or XY chromosomes in zygote depends on
(a) the sperm carrying X chromosome fertilized the ovum.
(b) the sperm carrying Y chromosome fertilized the ovum.
(c) the sperm without any chromosome fertilized the ovum.
(d) the sperm carrying X or Y chromosomes fertilized the ovum.
Question. Finger like projection, called chorionic villi, appear on the _________ after the implantation.
(d) inner cell mass
Question. The placenta is formed from the _______ of the embryo and the _______ of the mother.
(a) uterus, trophoblast
(b) chorion, endometrium
(c) endometrium, chorion
(d) inner cell mass, endometrium
Question. Primary germ layers are
(a) ectoderm and inner cell mass only.
(b) trophoblast, ectoderm and mesoderm.
(c) endoderm and mesoderm only.
(d) ectoderm, endoderm and mesoderm.
(a) is a hormone essential for milk secretion.
(b) can be synthesized by the newborn infant but not by a foetus.
(c) stimulates further secretion of oxytocin for uterine contraction.
(d) is a source of antibodies essential to develop resistance against diseases in new born babies.
Question. Two types of cells present in the lining of seminiferous tubules are _______ and _______.
(a) leydig cells, sertoli cells.
(b) male germ cells, sertoli cells.
(c) spermatogonium, spermatids.
(d) primary oocyte, leydig cells.
Question. First polar body is formed during the formation of _______ and completion of ___ meiotic division.
(a) Primary oocytes, II
(b) Secondary oocytes, I
(c) Secondary spermatocytes, II
(d) Primary spermatocytes, I
Question. In human female, menopause is a stage in which
(a) oogenesis starts at puberty.
(b) menstruation starts at puberty.
(c) corpus luteum starts secreting progesterone for maintaining pregnancy.
(d) menstruation stops at the age of 50 years and reproductive capacity is arrested.
Question. _______ is a sticky white or yellow fluid secreted by the breasts during the second half of pregnancy and for a few days after birth, before breast milk comes in.
(c) Egg yolk
(d) Blood cells
Question. By the end of how many weeks, major organ system are formed during the embryonic development?
(a) 4 weeks
(b) 8 weeks
(c) 12 weeks
(d) 24 weeks
Question. Identify the structure on the basis of the given statement which surrounds the primary sex organ of male reproductive system.
“It is responsible for maintaining the low temperature by about 2 – 2.5º C from normal body temperature to mature sperm.”
Question. Blastomeres are daughter cells formed in the process of
(a) cleavage, when zygote undergoes mitotic division.
(b) fertilization, when sperm enters in the cytoplasm of ovum.
(c) implantation, when blastocysts attached to the uterine endometrium.
(d) gametogenesis, when male and female gametes are produced by testis and ovary respectively
Statement Type Questions for Class 12 Biology Human Reproduction
Question. Read the following statements (i to iv) and answer the following question.
(i) Each testes has highly coiled 250 compartments called seminiferous tubules.
(ii) Erection of the penis due to presence of special tissues facilitates insemination.
(iii) Immunologically competent cells are also present in the interstitial spaces of seminiferous tubules.
(iv) Testes lie outside the abdominal cavity in a thin pouch like skin called scrotum.
(v) Bulbourethral gland is a single accessory gland.
How many of the above statements are incorrect?
(a) (i), (ii) and (iii)
(b) (iii) and (v)
(c) (i) and (v )
(d) (ii), (iv) and (v)
Question. Read the following statements (i to v) and answer the following question.
(i) This structure is also called womb.
(ii) Its shape is like an inverted pear.
(iii) The process of fertilization takes place in this structure.
(iv) The wall of this structure has three layers of tissue.
(v) It secretes several steroid hormones.
Identify the correct characteristics feature regarding uterus from the above statements.
(a) (i) and (iv)
(b) (iii) and (v)
(c) (i), (ii) and (iv)
(d) All the five statements.
Question. Select the correct statements regarding oogenesis.
(i) It is initiated during the embryonic development stage when millions of oogonia are formed within each ovary.
(ii) Graafian follicle releases primary oocyte from the ovary by ovulation.
(iii) At puberty only 60,000 – 80,000 primary follicles are left in each ovary.
(iv) Secondary oocyte within tertiary follicles grows in size and completes its second meiotic division.
(a) (i), (ii) and (iii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) all the four statements.
Question. Which of the following is required for the increased production of estrogen, progestogens, cortisol, prolactin and thyroxine etc. in the maternal blood?
(i) Metabolic changes in the mother.
(ii) Maintenance of pregnancy.
(iii) Supporting the foetal growth
(iv) Destruction of Graafian follicle
(a) (iii) and (iv)
(b) (i), (iv) and (v)
(c) (i), (ii) and (iii)
(d) All the four statements.
Question. Read the following statements (i to v) and answer the question.
(i) It produces several hormones like hCG, hPL, estrogens, progestogens etc.
(ii) It differentiates into three embryonic membranes – ectoderm, endoderm and mesoderm.
(iii) It undergoes mitotic division.
(iv) It is the organ, formed in the lining of the uterus by the union of the uterine mucous membrane with the membranes of the foetus.
(v) It develops at a point of implantation and providing waste products from the foetal to the maternal blood circulation.
Identify the correct characteristics feature regarding placenta from the above statements.
(a) (iii) and (v)
(b) (i), (iv) and (v)
(c) (i), (ii) and (iv)
(d) all the four statements.
Assertion / Reason Type Questions for Class 12 Biology Human Reproduction
In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.
Question. Assertion : In morula stage, cells divide without increase in size.
Reason : Zona pellucida remain undivided till cleavage is complete.
Question. Assertion : Corpus luteum degenerates in the absence of fertilization.
Reason : Progesterone level decreases.
Question. Assertion : Mammalian ova produces hyaluronidase.
Reason : The eggs of mammal are microlecithal and telolecithal.
Question. Assertion : Testicular lobules are the compartments present in testis.
Reason : These lobules are involved in the process of fertilization.
Matching Type Questions for Class 12 Biology Human Reproduction
Question. In the given columns, column I contain structures of male reproductive system and column II contains its feature. Select the correct match from the options given below.
|Column I |
(Structure of Male Reproductive System)
|A. Seminiferous tubule||I. Network of seminiferous tubule|
|B. Rete testis||II. Secondary sexual characters|
|C. Leydig cells||III. Meiosis and sperm formation occurs|
|D. Prepuce||IV. Place of implantation|
|V. Terminal skin of penis|
(a) A – I; B – II; C – III; D – V
(b) A – III; B – I; C – II; D – V
(c) A – III; B – I; C – IV; D – II
(d) A – II; B – IV; C – III; D – V
Question. In the given columns, column-I contain structures of female reproductive system and column-II contain its feature.
Select the correct match from the option given below.
(Structures of female reproductive system)
|A. Ampulla||I. It undergoes cyclical changes during menstrual cycle.|
|B. Labia majora||II. It helps in collection of ovum after ovulation.|
|C. Oviduct||III. Wider part of fallopian tube where fusion of male and female gametes takes place.|
|D. Fimbriae||IV. Larger hairy folds which extend down from the mons pubis and surrounds the vaginal opening.|
|E. Endometrium||V. Also called fallopian tubes, which extend from the periphery of each ovary to the womb.|
(a) A – I; B – II; C – III; D – V; E – IV
(b) A – III; B – I; C – II; D – V; E – IV
(c) A – III; B – IV; C – V; D – II; E – I
(d) A – II; B – IV; C – III; D – V; E – I
Question. In the given columns, column-I contain various phases of menstrual cycle and column -II contain its features.
Select the correct match from the options given below.
(Phases of menstrual cycle)
|A. Menstrual phase||I. Breakdown of endometrial lining of uterus along with its blood vessels which form liquid that comes out of vagina.|
|B. Luteal phase||II. A temporary endocrine gland is formed and secretes a hormone which maintains endometrium and implantation of fertilized ovum and other events of pregnancy.|
|C. Follicular phase||III. Secretion of luteinizing hormone at its maximum level and induces breakdown of mature follicle to release the female gamete|
|D. Ovulatory phase||IV. Formation of mature Graafian follicle and regeneration of endometrium of uterus.|
(a) A – IV; B – II; C – III; D – I
(b) A – III; B – I; C – II; D – IV
(c) A – III; B – I; C – IV; D – II
(d) A – I; B – II; C – IV; D – III
Question. Match the hormones given in column-I with their functions given in column-II and select the correct option.
|A. Luteinizing||I. Develop corpus luteum hormone|
|B. Progesterone||II. Essential for maintenance of uterine layer (called endometrium)|
|C. Estrogen||III. Develops female secondary sexual characters|
|D. Follicle stimulating||IV. Maturation of Graafian hormone follicle|
|E. Oxytocin||V. Causes uterine contraction.|
(a) A – I; B – V; C – III; D – II; E – IV
(b) A – III; B – I; C – II; D – IV; E – V
(c) A – I; B – II; C – III; D – IV; E – V
(d) A – I; B – II; C – III; D – V; E – IV
Question. Select the correct match of terms given in column-I with their definition given in column -II.
|A. Parturition||I. Duration between pregnancy (of about 9 month) and birth|
|B. Ovulation||II. Attachment of zygote to the endometrium|
|C. Gestation||III. Childbirth|
|D. Implantation||IV. Stoppage of menstruation|
|E. Conception||V. Release of egg from Graafian follicle|
|VI. Process of milk secretion|
|VII. Formation of zygote by fusion of the egg and sperm|
(a) A – I; B – II; C – VII; D – V; E – III
(b) A – III; B – I; C – IV; D – II; E – V
(c) A – III; B – V; C – I; D – II; E – VI
(d) A – III; B – V; C – I; D – IV, E – II
Diagram Type Questions for Class 12 Biology Human Reproduction
Question. Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts marked as A, B, C, and D respectively.
Question. Given below is the diagrammatic sectional view of seminiferous tubule with their parts marked as A, B, C, and D. Select the option which shows the correct identification of the structure with its characteristics.
(a) A: Spermatozoa, secretes testicular hormones that control spermatogenesis.
(b) B: Spermatogonium, it is also called male germ cells which undergo meiotic division to from spermatozoa.
(c) C: Interstitial cells, present in the interstitial spaces and store and transport the sperms from the testis to the outside through the urethra.
(d) D: Sertoli cells, it maintains low temperature of the testis.
Question. Refer the figure of mammary gland with few structures marked as A, B, C and D. Which structure contains clusters of milk secreting cells?
Question. The figure given below shows the structure of sperm.
Identify the correct feature corresponding to the marked structure A, B, C and D.
(a) A – Head: Its anterior portion is covered by a structure filled with enzymes that help in the fusion of male and female gametes.
(b) B – Middle piece: It contains a haploid nucleus.
(c) C – Neck: It possesses few ribosomes which produces energy for the process of fertilization.
(d) D – Tail: It releases energy source for swimming of sperm.
Question. The given figure shows the diagrammatic representation of oogenesis. Identify the option which shows the correct label marked as A, B, C and D.
(a) A: Tertiary; B: I; C: Fertilization; D: Primary oocyte.
(b) A: Primary; B: II; C: Ovulation; D: Secondary oocyte.
(c) A: Secondary; B: II; C: Fertilization; D: Primary oocyte.
(d) A: Primary; B: I; C: Ovulation; D: Secondary oocyte.
Question. In the given figure the structure of ovum is surrounded by few sperms and some art are labelled as A, B, C and D.
Which of the following options shows the correct labelling?
(a) A→Zona pellucida, B→Ovum , C→Cells of corona radiata, D→Perivitelline space
(b) A→Perivitelline space, B→Antrum, C→Zonapellucida D→Ovum
(c) A→Zona pellucida, B→Ootid, C→Cells of coronaradiata D→Perivitelline space
(d) A→Cells of corona radiata, B→Morula, C→Perivitelline space D→Zona pellucida
Question. Study the given figure and conclude the correct explaination from the options given below:
(a) All the sperm attaches with ovum.
(b) Transport of sperm towards the ovum.
(c) Ovum and surrounded sperms were going to take part in fertilization.
(d) Sperm induces changes in the cells of corona radiata and blocks the entry of other additional sperms.
Question. The given figure shows the diagrammatic sectional view of female reproductive system with few structures marked as A, B, C, and D.
Select the option which shows the correct identification of the structure with its characteristics.
(a) A: Infundibulum, funnel shaped structure surrounded by finger like projection.
(b) B: Ampulla, wider part of oviduct where fertilization occurs.
(c) C: Isthmus, it has a narrow lumen and joins with uterus.
(d) D: Fimbriae, it collects ovum before ovulation.
Question. Study the given figure and identify the correct event occuring in this.
(a) Role of pituitary hormones levels.
(b) Events occurring in uterine tissues.
(c) Role of ovarian hormone levels and growth of ovarian follicles.
(d) Both (a) and (c).
Question. The given figure represent a stage of embryonic development. Identify the stage with its feature.
(a) Blastocysts, ready to fertilize with sperm.
(b) Secondary oocyte, implants on endometrial layer of uterus.
(c) Morula, formed by mitotic division of zygote.
(d) Ovary, produce female gamete and secretes hormones like estrogen etc
Question. The given figure shows the structure of sperm whose tail enables it to swim. Why the sperm does needs to swim?
(a) In order to get the ovum for fertilization.
(b) It helps the foetus to come out of the uterus.
(c) It helps blastocysts to attach in endometnum in the process of implantation.
(d) It helps the sperm to enter into the cytoplasm of the ovum through the zona pellucida and plasma membrane.
Question. The figure given below shows a flowchart on spermatogenesis. Identify the correct label marked as A, B, C and D.
(a) A: Ist meiotic division; B: 2nd meiotic division; C:Differentiation; D: 23.
(b) A: 2nd meiotic division; B: Differentiation; C: Ist meiotic division; D: 46.
(c) A: Differentiation; B: 2nd meiotic division; C: Ist meiotic division; D: 46.
(d) A: Mitosis differentiation; B: Ist meiotic division; C: 2ndmeiotic division; D: 23.
Critical Thinking Type Questions for Class 12 Biology Human Reproduction
Question. Read the following statement and answer the question.
“The urethra originates from a structure (called ‘X’) and extends through the male external genitalia (called ‘Y’ which helps in introducing semen into the vagina) to its external opening called urethral meatus.”
Identify X and Y.
(a) X – Urinary bladder ; Y – Penis
(b) X – Vas efferentia ; Y – Penis
(c) X – Ejaculatory duct ; Y – Ureter
(d) X – Bulbourethral gland ; Y – Ureter
Question. Milk secreted from the cells of alveoli of mammary lobes reaches nipple through lactiferous duct(L), mammary duct (M), mammary tubule (T) and mammary ampulla (A) in the following order.
Question. Secretion of which of the following are essential for maturation and motility of sperm?
(a) Ureter, vas deferens, urinary bladder and prostate.
(b) Seminal vesicle, vas deferens, ejaculatory ducts and ureter.
(c) Epididymis, seminal vesicle, vas deferens and prostate.
(d) Epididymis, ejaculatory ducts, vas efferentia and seminal vesicle.
Question. How many ova are released during the middle of the menstrual cycle?
Question. Which of the following hormones attains a peak level in the middle of menstrual cycle?
(a) LH and estrogen
(b) FSH and progesterone
(c) FSH and LH
(d) Estrogen and progesterone
Question. Menstrual cycle is controlled by
(a) LH and FSH only
(b) estrogen, LH & FSH only
(c) estrogen & progesterone only
(d) LH, FSH, estrogen & progesterone.
Question. Fertilization can only occurs if
(a) sperm reaches to the ampullary – isthmic junction before the ovum.
(b) ovum reaches to the ampullary – isthmic junction before the sperm.
(c) sperms are transported to the uterus and ovum to the fallopian tube simultaneously.
(d) sperm and ovum are transported simultaneously to the ampullary – isthmic junction.
Question. The acrosome enables the sperm to
(a) help in motility.
(b) produce energy for activity.
(c) penetrate vitelline membrane of ovum.
(d) fertilize more than one ovum.
Question. Foetal ejection reflex in human female is induced by
(a) placenta only.
(b) fully developed foetus and placenta.
(c) release of oxytocin from pituitary gland.
(d) release of full developed corpus luteum.
Question. Each spermatogonium which is diploid contains how many chromosomes?
Question. After the transformation of spermatids into sperm, their heads become embedded in a cell called “X” and are finally released from the “Y” by the process called “Z”. Identify X, Y and Z.
(a) Spermatogonium Epididymis Insemination
(b) Leydig Vas deferens Parturition
(c) Sertoli Seminiferous tubule Spermiation
(d) Spermatocyte Seminiferous tubule Spermiogenesis
Question. “A” cells start division and enter in “B” stage of meiotic division and get temporarily “C” at this stage, called “D”.
Identify A, B, C and D.
(a) A: Oogonia; B: Metaphase I; C: Arrested; D: Primary oocyte.
(b) A: Oogonia; B: Anaphase I; C: Released; D: Secondary oocyte.
(c) A: Oogonia; B: Prophase I; C: Arrested; D: Primary oocyte.
(d) A: Oogonia; B: Telophase I; C: Released; D: Secondary oocyte.
Question. Study the following statements and answer the question.
In a process called ‘A’, ‘B’ division starts as the zygote moves through the ‘C’ of the ‘D’ towards the ‘E’.
Identify A, B, C, D and E.
(a) A→Blastulation, B→Meiotic, C→Ampulla , D→Fallopian tube, E→Uterus
(b) A→Parturition, B→Meiotic, C→Infundibulum, D→Uterus, E→Vagina
(c) A→Implantation, B→Mitotic, C→Fimbriae, D→ Ovary E→Cervix
(d) A→Cleavage, B→ Mitotic, C→Isthmus, D→ Oviduct E→Uterus