Worksheets Class 12 Biology Human Reproduction

Students should refer to Worksheets Class 12 Biology Human Reproduction Chapter 3 provided below with important questions and answers. These important questions with solutions for Chapter 3 Human Reproduction have been prepared by expert teachers for Class 12 Biology based on the expected pattern of questions in the class 12 exams. We have provided Worksheets for Class 12 Biology for all chapters on our website. You should carefully learn all the important examinations questions provided below as they will help you to get better marks in your class tests and exams.

Biology Human Reproduction Worksheets Class 12

Question. The __________ lead to vas deferens that ascends to the ______ and loops over the __________.
(a) prostate, stomach, urinary bladder.
(b) epididymis, abdomen, urinary bladder.
(c) vas efferentia, abdomen, ureter.
(d) urinary bladder, ejaculatory duct, abdomen.

Question. Which of the following is a transporting tube leading from the bladder to which brings urine outside the body via penis?
(a) Ureter
(b) Epididymis
(c) Ejaculatory duct
(d) Urethra meatus

Question. A sac shaped like an upside down pear with a thick lining and muscles in the pelvic area where a fertilized egg or zygote comes to grow into a baby is called _______.
(a) oviduct
(b) uterus
(c) vagina
(d) vulva

Question. Which of the following produces sperms in spermatogenesis?
(a) Sertoli cells.
(b) Interstitial cells.
(c) Primary spermatocytes.
(d) Immature male germ cells.

Question. Spermatids are transformed into sperm by a process called_______.
(a) spermiation
(b) implantation
(c) insemination
(d) spermiogenesis

Question. Increased secretion of which hormone start the process of sperm formation at the time of puberty?
(a) GH
(b) TSH
(c) PRL
(d) GnRH

Question. Which of the following hormone maintains the function of male sex accessory gland and ducts?
(a) Estrogen
(b) Androgen
(c) Progesterone
(d) Luteinizing hormone

Question. Ejaculation of human male contains about 200 – 300 million sperms, of which for normal fertility ____ % sperms must have normal shape and size and at least ____% must show energetic motility.
(a) 40, 60
(b) 50, 50
(c) 60, 40
(d) 30, 70

Question. By which process sperms released from the seminiferous tubules?
(a) Spermiation
(b) Insemination
(c) Spermatogenesis
(d) Spermiogenesis

Question. Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.
(a) Luteinizing hormone
(b) Follicle stimulating hormone
(c) Progesterone
(d) Estrogen

Question. Which phase of menstrual cycle is also called proliferative phase?
(a) Luteal
(b) Ovulatory
(c) Follicular
(d) Menstruation

Question. Which of the following indicates pregnancy?
(a) Lack of menstruation.
(b) Occurrence of menstrual flow.
(c) When released ovum is not fertilized.
(d) When Graafian follicle matures and endometrium regenerates through proliferation.

Question. At the time of implantation, the human embryo is called ______.
(a) zygote
(b) blastocysts
(c) embryo
(d) foetus

Question. Which of the following differentiate into embryo?
(a) Morula
(b) Zygote
(c) Trophoblast
(d) Inner cell mass

Question. The embryo with 8 to 16 blastomeres is called ________.
(a) zygote
(b) morula
(c) placenta
(d) blastocysts

Question. Which layer of blastocysts gets attached to the endometrium?
(a) Trophoblast
(b) Inner cell mass
(c) Umbilical cord
(d) Both (a) and (c)

Question. Which of the following hormones is produced in women only during pregnancy?
(a) Relaxin
(b) Estrogen
(c) Oxytocin
(d) Progesterone

Question. Placenta acts as an
(a) Embryo
(b) Corpus luteum
(c) Exocrine gland
(d) Endocrine tissue

Question. Which of the following hormone acts on uterine muscle and causes its stronger contraction?
(a) Relaxin
(b) Estrogen
(c) Oxytocin
(d) Progesterone

Question. Secretion of milk from the mammary gland towards the end of the pregnancy is called_____.
(a) lactation
(b) parturition
(c) fertilization
(d) implantation

Question. The womb opens into vagina through _______.
(a) cervix
(b) hymen
(c) clitoris
(d) ampulla

Question. Second meiotic division in secondary oocyte results in the formation of
(a) first polar body and a diploid ovum.
(b) first polar body and a haploid ovum.
(c) second polar body and a diploid ovum.
(d) second polar body and a haploid ovum

Question. Which of the following process induces the completion of the meiotic division of secondary oocyte?
(a) Parturition
(b) Implantation
(c) Fertilization
(d) Gametogenesis

Question. Which gland releases a small amount of fluid just prior to ejaculation to decrease acidity in the urethra caused by urine?
(a) Prostate
(b) Glans penis
(c) Seminal vesicle
(d) Bulbourethral gland

Question. Which of the following induces foetal ejection reflex?
(a) Initiation of lactation
(b) Fully developed foetus and placenta
(c) Expulsion of the baby out of the uterus.
(d) Transport of embryo in the fallopian tube.

Question. Which of the following is not a paired structure in male?
(a) Urethra
(b) Vas deferens
(c) Epididymis
(d) Ejaculatory duct

Statement Type Questions for Class 12 Biology Human Reproduction

Question. The sperm and the egg make different contributions to zygote. Which of the following statements about their contributions are true?
(i) Sperm contributes most of the mitochondria.
(ii) Egg contributes most of the cytoplasm.
(iii) Both sperm and egg contribute haploid nucleus.
(iv) Both sperm and egg contribute centrioles.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iiii) and (iv)
(d) All of these

Question. Which of the following is true regarding the male reproductive system?
(a) Sperms are diploid.
(b) It includes testes, accessory ducts and glands, and oviducts.
(c) The scrotum keeps the testes warmer, thus helping it to promote the sperm formation.
(d) Sertoli cells are found in seminiferous tubules and provide nutrition to germ cells.

Question. Which of the following statements regarding mammary gland is incorrect?
(a) They are paired glandular structure that lies over the pectoral muscles.
(b) Each gland has 100 – 500 lobulated milk glands each having a number of lobules containing number of alveoli.
(c) The cells of alveoli secrete milk which is stored in the cavity of the alveoli.
(d) Each milk gland or lobules has lactiferous ducts that drain into openings in the nipple.

Question. Which of the following statement is correct regarding menstruation?
(a) The menstrual fluid can easily clot.
(b) The end of the cycle of menstruation is called menarche.
(c) At menopause in the female, there is especially abrupt decrease in gonadotropic hormones.
(d) In human female, menstruation can be deferred by the administration of combination of estrogen and progesterone.

Question. Which of the following statement regarding female reproductive system is (are) correct?
(i) Myometrium undergoes strong contraction at the time of delivery of baby.
(ii) Ovary is secondary female sex organ which produces female gamete and steroid hormones.
(iii) Ovarian stroma is divided into two zones: inner cortex and outer medulla.
(iv) Infundibulum possess finger like projections which help in collection of ovum after the release of secondary oocyte.
(v) A functional mammary gland is the characteristics of all the mammals (including male and female).
(a) (i) and (iv)
(b) (i), (ii), (iii) and (v)
(c) (iii), (iv) and (v)
(d) All the five statements

Question. Which of the following statements regarding parturition is incorrect?
(a) Prolactin induces uterine contraction.
(b) It is induced by neuroendocrine mechanism.
(c) Uterine contraction leads to expulsion of baby through the birth canal.
(d) Oxytocin plays an important role in the contraction of fallopian tube.

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 : During fertilization only head of spermatozoa enters egg.
Reason : If several spermatozoa hit the egg at same time, all can enter the egg.

Question. Assertion : Death is one of the important regulatory process on earth.
Reason : It avoids over-crowding caused by continuous reproduction.

Question. Assertion : Clitoris is not remnant of penis in females.
Reason : It also have high blood supply and erectile tissue.

Question. Assertion : Interstitial cell is present in the region outside the seminiferous tubule called interstitial spaces.
Reason : Interstitial cells provide nutrition to the sertoli cells.

Question. Assertion : Head of sperm consists of acrosome and mitochondria.
Reason : Acrosome contains spiral row of mitochondria.

Matching Type Questions for Class 12 Biology Human Reproduction

Question. Which of the following pair is incorrectly matched?
(a) Leydig cells – Testosterone
(b) Spermatogenesis – Seminiferous tubules
(c) Male reproductive system – Pelvis region
(d) Spermatogonia – Mitotic division

Question. Match the column-I with column-II and select the correct option. Match from the options given below.

Column-I	Column-II
A. Primary oocyte	I. It is formed when oogonia starts division and temporarily arrested at prophase of meiosis I.
B. Secondary oocyte	II. A large haploid cell which retains bulk of nutrient rich cytoplasm of the primary oocyte.
C. Primary follicle	III. A large number of these degenerate during the phase from puberty to birth.
D. Oogonia	IV. Gamete mother cell.
E. Secondary follicle	V. Surrounded by more layers of granulosa cells and a new theca.
F. Graafian follicle	VI. Rupture to release ovum from the ovary.

(a) A – I; B – II; C – III; D – IV; E – V; F – VI
(b) A – III; B – I; C – IV; D – II; E – V; F – VI
(c) A – VI; B – IV; C – V; D – II; E – I; F – III
(d) A – II; B – IV; C – III; D – V; E – I; F – VI

Question. In the given columns, column-I contain features of developing child and column-II contain the time of their occurrence. Select the correct match.

Column-I (Features of occurrence)	Column-II (Time of there developing child)
A. Heart sound	I. By the end of the second month of pregnancy
B. Foetus develops limbs and digit	II. During the fifth month
C. Formation of major organ system foetus	III. First sign of growing
D. First movement of foetus and appearance of hair on head	IV. By the end of 12 weeks
E. Body covered with hair, eyelid separate, eyelashes are formed	V. By the end of 24 weeks

(a) A – I; B – II; C – III; D – IV; E – V
(b) A – III; B – I; C – IV; D – II; E – V
(c) A – II; B – I; C – III; D – V; E – IV
(d) A – III; B – IV; C – II; D – V; E – I

Question. Match the column-I with column-II and select the correct option.

Column-I	Column-II
A. Fertilization	I. Mitotic division
B. Implantation	II. Embryo with 8 to 16 blastomeres
C. Cleavage	III. Ampullary-isthmic junction
D. Morula	IV. Structure formed by the continuous division of 8 to 16 blastomeres
E. Blastocysts	V. Embedding of blastocysts in the endometrium

(a) A – I; B – II; C – IV; D – V; E – III
(b) A – III; B – I; C – IV; D – II; E – V
(c) A – III; B – V; C – I; D – IV; E – II
(d) A – III; B – V; C – I; D – II; E – IV

Diagram Type Questions for Class 12 Biology Human Reproduction

Question. The given figure shows the male reproductive system.
Some structures are marked as A, B, C, and D.
Identify the structure whose removal will cause the sperm to be reacted with acidic urine in the urethra.

(a) A
(b) B
(c) C
(d) D

Question. Identify the figure (A) whose sectional view is given below and match with its characteristics (B) and its location (C).

Question. The given figure shows the diagrammatic sectional view of female reproductive system with few structures marked as A, B, C, D, E and F.

Which of the following options shows the correct labeling of A–F?
(a) A→Myometrium, B→Isthmus, C→Endometrium,D→ Perimetrium, E→Ampulla, F→ Infundibulum 
(b) A→Infundibulum, B→Perimetrium, C→Endometrium, D→Myometrium,E→Ampulla, F→Isthmus
(c) A→Endometrium, B→Myometrium,C→Perimetrium, D→Isthmus, E→Ampulla,F→Infundibulum
(d) A→Perimetrium, B→Endometrium, C®Isthmus,D→Infundibulum, E→Ampulla, F→Myometrium

Question. The figure given below shows the sectional view of seminiferous tubule.

Which marked structure (A to D) undergoes second meiotic division to produce four equal haploid cells (called spermatids)?
(a) A
(b) B
(c) C
(d) D

Question. The figure given below shows the sectional view of ovary. Select the option which gives correct identification of marked structure (A to D) and its feature.

(a) A: Primary follicle, it is also called gamete mother cell.
(b) B: Corpus luteum, it cannot be formed and added after birth.
(c) C: Graafian follicle, mature follicle which ruptures to release secondary oocyte.
(d) D: Tertiary follicle, a large number of this follicle degenerates during the phase from birth to puberty.

Question. The figure given below shows the various events occurring during a menstrual cycle with few structures marked as A, B, C and D. Which of the following options shows the correct labeling?

(a) A→LH, B→Ovulation, C→ Menstruation, D→ Proliferative phase, E→Luteal phase 
(b) A→FSH, B→Implantation, C→Follicular phase, D→Menstruation phase, E→Luteal phase
(c) A→Estrogen, B→Parturition, C→Luteal phase, D→Follicular phase, E→Follicular phase
(d) A→Progesterone, B→Fertilization, C→ Menstruation phase, D→Secretory phase, E→ Follicular phase

Question. The given figure shows the human foetus within the uterus with few structures marked as A, B, C and D.

Which of the following options shows the correct labeling?
(a) A→Umbilical cord with its veins, B→Chorionic villi,C→Antrum, D→Plug of mucus in cervix
(b) A→Umbilical cord with its vessels, B→Fimbriae,C→ Oocyte, D→Plug of mucus in vagina
(c) A→Umbilical cord with its vessels, B→Placental villi C→Yolk sac, D→Plug of mucus in cervix
(d) A→Umbilical cord with its veins, B→Placental villiC→Trophoblast, D→Plug of mucus in vagina

Question. Identify the structure marked as “X” and its function in the given figure of male reproductive system.

(a) Rete testis: It helps seminiferous tubule to open into vas efferentia.
(b) Bulbourethral gland: It secretes alkaline mucus for lubricating the reproductive tract.
(c) Vas efferentia: They have contractile mechanism that aids in the emission of seminal fluid.
(d) Seminal vesicle: It synthesizes and secrete testicular hormone.

Question. “X” is a hormone which is secreted under the influence of GnRH. Identify “X” and the correct marked structures (A to D) from the figure given below on which “X” acts to stimulate secretion of some factors to help in spermiogenesis.

(a) “X” – LH, A
(b) “X” – GH, B
(c) “X” – ACTH, C
(d) “X” – FSH, D

Question. The given figure shows the human foetus within the uterus. Identify the marked label (A to D) through which placenta is connected to the embryo.

(a) A
(b) B
(c) C
(d) D

Question. In the given figure, which two marked structure (A to D) is present in the lining of seminiferous tubule?

(a) A and D
(b) B and D
(c) C and D
(d) A and B

Question. The given diagram shows a human female’s reproductive system. Select the part (labelled as A, B, C & D) where semen is released into the female by the penis during copulation.

(a) A
(b) B
(c) C
(d) D

Critical Thinking Type Questions for Class 12 Biology Human Reproduction

Question. The feature of some structures of male reproductive system is given below. Identify the structure on the basis of the characteristics which surrounds the primary sex organ of male reproductive system.
(a) Its enlarged end is called glans penis.
(b) It travels through the penis and carry semen as well as urine.
(c) It is responsible for maintaining the low temperature by about 2 – 2.5º C from normal body temperature to mature sperm.
(d) Stores sperms prior to ejaculation.

Question. Which of the following is not a uterine function?
(a) Waste removal for the developing embryo.
(b) Nutritional support of the growing embryo.
(c) Place of fusion of male and female gametes.
(d) Mechanical protection of the developing embryo.

Question. A gonadotropin hormone, “X” acts on interstitial cells and stimulates synthesis and secretion of “Y”.
Identify X and Y from the given option.
(a) X – LH ; Y – Androgen
(b) X – FSH ; Y – Testosterone
(c) X – TSH ; Y – Progesterone
(d) X – GH ; Y – Estrogen

Question. Which of the following shows the correct sequence of events leading to the formation of mature sperm?
(a) Spermatogonium → Secondary spermatocyte →Primary spermatocyte → Spermatids → Sperms.
(b) Spermatogonium →Spermatids → Secondaryspermatocyte → Primary spermatocyte → Sperms.
(c) Spermatids → Primary spermatocyte → Secondaryspermatocyte →Spermatogonium → Sperms.
(d) Spermatogonium → Primary spermatocyte →Secondary spermatocyte → Spermatids → Sperms.

Question. Study the given statement and answer the question.
“During ‘P’ phase of the menstrual cycle, if pregnancy doesn’t happen, the ‘Q’ withers and dies, usually around day 22 in a 28-day cycle. The drop in ‘R’ levels causes the lining of the uterus to fall away. This is known as ‘S’. 
Identify P, Q, R and S.
(a) P → Menstrual, Q → Graafian follicle, R→ Estrogen, S → Menarche
(b) P → Luteal, Q → Corpus luteum, R → Progesterone S → Menstruation
(c) P → Ovulatory, Q → Endometrium, R → Follicle stimulating hormone, S → Menopause
(d) P → Follicular, Q → Secondary oocyte, R → Luteinizing hormone S→ Menstruation

Question. Select the correct sequence of menstrual cycle.
(a) Menstruation, Secretory, Follicular, New cycle.
(b) Menstruation, Follicular, Luteal, New cycle.
(c) Follicular, Menstruation, Luteal, New cycle.
(d) Luteal, Menstruation, Follicular, New cycle.

Question. Which of the following is the first change that occurs to the zygote after fertilization?
(a) It divides to form a hollow ball of cells, called the blastocyst.
(b) It begins to secrete the hormones.
(c) It contacts the endometrial wall of the uterus and becomes buried inside it.
(d) It initiates the formation of a placenta.

Question. Which of the following does not occur in the time during and immediately following fertilization?
(a) Fusion of the sperm and ovum nuclei.
(b) Division of the oocyte cell by meiosis
(c) Implantation of the ovum in the uterus.
(d) Digestion of cell layers around the oocyte by sperm.

Question. At the time of fertilization, chromosome number
(a) is halved
(b) remains haploid
(c) becomes diploid
(d) does not change

Question. Study the statement given below and answer the question.
“Vigorous contraction of the ‘X’ at the end of the ‘Y’ causes expulsion of the foetus.” Identify X and Y.
(a) X -Vagina ; Y – Fertilization
(b) X – Uterus ; Y – Pregnancy
(c) X – Placenta ; Y – Implantation
(d) X – Embryo ; Y – Ovulation

Question. Which of the following group of cells involved in spermatogenesis represent haploid cells?
(a) Spermatogonium
(b) Primary spermatocyte
(c) Both (a) and (b)
(d) Secondary spermatocyte

Question. Select the option which shows the correct part of a sperm with its corresponding function.
(a) Head: Stimulate Leydig cell to produce androgen hormone.
(b) Neck: Essential for maturation and motility of sperm.
(c) Middle piece: Produces energy from mitochondria for tail movement which facilitate sperm motility.
(d) Tail: Help in fertilization with the help of enzyme present in acrosome.

Question. What happens during fertilization in humans after many sperms reach close to the ovum?
(a) Cells of corona radiata trap all the sperms except one
(b) Only the closest sperm to the ovum penetrates the zona pellucida.
(c) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida and plasma membrane.
(d) All sperms except the one nearest to the ovum lose their tails.

Question. What will happen to pregnancy if placenta fails to function during the gestation?
(a) The pregnancy would not continue.
(b) The foetus would be born prematurely.
(c) There would be no effect on the pregnancy.
(d) The corpus luteum would continue produce hormone as an alternative source until birth.