NEET Zoology Human Reproduction Class 12 Questions

Incorrect statement w.r.t human reproduction is (1) Capacitation occurs in female reproductive tract. (2) Fertilization is feasible if both sperm and ovum are transported simultaneously to the ampullary region of fallopian tube. (3) Circulating levels of estrogen and progesterone in females regulates the changes in GnRH pulse frequency. (4) In females, meiosis-I completes at the time of birth.

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

Match the following and choose the correct options:

In spermatogenesis, reduction division of chromosomes occurs during conversion of

Assertion: The presence or absence of hymen is not a reliable indicator of virginity or sexual experience. Reason: It can also be broken by a sudden fall or jolt, insertion of a vaginal tampon, active participation in some sports like horseback riding, cycling, etc., or in some women the hymen persists even after coitus.

At the time of fertilization

The first movement of foetus and hairs on the head appears after

The first movement of foetus can be observed during which month of pregnancy?

Assertion (A) : Zygote is considered as the vital link. Reason (R) : Zygote ensures continuity of species between organisms of one generation and the next. In the light of above statements, choose the correct answer from the options given below.

The figure given below represents human foetus within the uterus. Identify A, B, C and D. Choose the correct option.

Sertoli cells are found in

How many spermatids are produced by 120 secondary spermatocytes?

Hormone releasing IUD among the following is

How many statements are true for reproduction in Periplaneta americana? (i) Anterior part of female genital pouch contains female gonopore, spermathecal pores and collateral glands. (ii) In males, genital pouch or chamber lies at the hind end of abdomen bounded dorsally by 9^{th} and 10^{th} terga and ventrally by the 9^{th} sternum. (iii) Males, genital pouch contains dorsal anus, ventral male genital pore and gonapophysis. (iv) Males bear a pair of short, thread like anal styles which are absent in females. (v) In both sexes, the 10^{th} segment bears a pair of jointed filamentous structures called anal cerci.

Given below are assertion and reason mark the correct choice from given options. Assertion: The oviducts, uterus and vagina are female accessory ducts. Reason: The mammary glands are one of the female secondary sexual characteristics.

Spermatogonia undergo a series of cell divisions statements to produce sperms. Select the correct from the following: A. Spermatogonia always undergo meiotic cell division. B. Primary spermatocytes divide mitotically to produce secondary spermatocytes. C. Secondary spermatocytes, through their second meiotic division, produce haploid spermatids. D. Spermatids produce spermatozoa through mitosis. E. Spermatids transform into spermatozoa by spermiogenesis.

Match List I with List II related to embryonic development at various months of pregnancy:

In which animal do haploid cells divide mitotically to produce gametes?

Arrange the following cell layers/structures around the female gamete, from outer to inner side: A. Zona pellucida B. Perivitelline space C. Corona radiata D. Plasma membrane of ovum

Match List - I with List - II. List - I A. Head B. Middle piece C. Acrosome D. Tail List - II I. Enzymes II. Sperm motility III. Energy IV. Genetic material Choose the correct answer from the options given below:

Find the correct statements : A. In human pregnancy, the major organ systems are formed at the end of 12 weeks. B. In human pregnancy the major organ systems are formed at the end of 8 weeks. C. In human pregnancy heart is formed after one month of gestation. D. In human pregnancy, limbs and digits develop by the end of second month. E. In human pregnancy the appearance of hair is usually observed in the fifth month. Choose the correct answer from the options given below:

Consider the following: A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis. B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females. C. The first polar body is associated with the formation of the primary oocyte. D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding. Choose the correct answer from the options given below:

The first menstruation is called :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : FSH acts upon ovarian follicles in female and Leydig cells in male. Reason R : Growing ovarian follicles secrete estrogen in female while interstitial cells secrete androgen in male human being. In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Breast-feeding during initial period of infant growth is recommended by doctors for bringing a healthy baby. Reason R : Colostrum contains several antibodies absolutely essential to develop resistance for the new born baby. In the light of the above statements, choose the most appropriate answer from the options given below :

Which of the following is not a component of Fallopian tube?

Identify the correct option (A), (B), (C), (D) with respect to spermatogenesis.

Which of the following statements are correct regarding female reproductive cycle? A. In non-primate mammals cyclical changes during reproduction are called oestrus cycle. B. First menstrual cycle begins at puberty and is called menopause. C. Lack of menstruation may be indicative of pregnancy. D. Cyclic menstruation extends between menarche and menopause. Choose the most appropriate answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Endometrium is necessary for implantation of blastocyst. Reason R: In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement I: Vas deferens receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct. Statement II: The cavity of the cervix is called cervical canal which along with vagina forms birth canal. In the light of the above statements, choose the correct answer from the options given below:

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis? i. It results in the formation of haploid gametes ii. Differentiation of gamete occurs after the completion of meiosis iii. Meiosis occurs continuously in a mitotically dividing stem cell population iv. It is controlled by the Luteinising hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary v. It is initiated at puberty Choose the most appropriate answer from the options given below:

At which stage of life the oogenesis process is initiated?

Given below are two statements: Statement I: The release of sperms into the seminiferous tubules is called spermiation. Statement II: Spermiogenesis is the process of formation of sperms from spermatogonia. In the light of the above statements, choose the most appropriate answer from the options given below:

Receptors for sperm binding in mammals are present on:

Which of these is not an important component of initiation of parturition in humans?

Match the following columns and select the correct option.

Meiotic division of the secondary oocyte is completed:

Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?

Select the CORRECT sequence for transport of sperm cells in male reproductive system.

Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains:

Extrusion of second polar body from egg nucleus occurs:

The difference between spermiogenesis and spermiation is

Match the items given in Column I with those in Column II and select the correct option given below:

Hormones secreted by the placenta to maintain pregnancy are

The amnion of mammalian embryo is derived from

Capacitation occurs in

A temporary endocrine gland in the human body is

Select the INCORRECT statement:

Identify the CORRECT statement on inhibin.

Fertilization in humans is practically feasible only if: