Description : The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic (a) B- Corpus luteum - Secretes progesterone (b) A- ... Secretes estrogen (d) A- Primary oocyte - It is in the prophase I of the meiotic division
Last Answer : (a) B- Corpus luteum - Secretes progesterone
Description : Which of the following approaches does not give the defined action of contraceptive? (a) Hormonal contraceptives Prevent/retard entry of sperms, prevent ovulation and fertilisation (b) ... devices Increase phagocytosis of sperms, suppress sperm motility and fertilising capacity of sperms
Last Answer : (b) Vasectomy Prevents spermatogenesis
Description : Egg is liberated from ovary in (a) secondary oocyte stage (b) primary oocyte stage (c) oogonial stage (d) mature ovum stage.
Last Answer : (a) secondary oocyte stage
Description : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce.
Last Answer : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce. A. ... Spermatogonia `rarr` Sperms D. Spermatogonia
Description : During spermatogenesis how many spermatozoa are formed from a single primary spermatocyte
Last Answer : During spermatogenesis how many spermatozoa are formed from a single primary spermatocyte A. 1 B. 2 C. 4 D. 8
Description : Sperms produce an enzymatic substance or lysin for dissolving egg coverings. It is called
Last Answer : Sperms produce an enzymatic substance or lysin for dissolving egg coverings. It is called A. ... B. hyaluronidase C. Androgamone D. Diastase.
Description : The technique called Gamete Intra Fallopian Transfer (GIFT) is recommended for those females (a) who cannot produce an ovum (b) who cannot retain the fetus inside uterus (c) whose cervical ... narrow to allow passage for the sperms (d) who cannot provide suitable environment for fertilisation.
Last Answer : (a) who cannot produce an ovum
Description : How many sperms are produced from one primary spermatocyte?
Last Answer : How many sperms are produced from one primary spermatocyte? A. 8 B. 6 C. 2 D. 4
Description : How many sperms are formed by one primary spermatocyte ?
Last Answer : How many sperms are formed by one primary spermatocyte ? A. 4 B. 3 C. 2 D. 1
Description : (i) Mention the event that induces the completion of the meiotic division of the secondary oocyte. (ii) Trace the journey of the ovum from the ovary, its fertilisation and further development until the implantation of the embryo. -Biology
Last Answer : (i)Secondary oocyte completes meiosis-ll only when a sperm enters its cytoplasm. It forms a larger cell, the ootid and a small cell, the second polar body. (ii)The secondary oocyte is ... and inner cell mass.The trophoblast attacheds to endometrium (implantation) and blastocyst gets embedded in it.
Description : In humans the oocyte is maintained in a state of meiotic arrest by the secretion of
Last Answer : In humans the oocyte is maintained in a state of meiotic arrest by the secretion of A. Granulosa cells B. Zona pellucida C. Cumulus oophorus D. Theca.
Description : Secodnary oocyte is formed
Last Answer : Secodnary oocyte is formed A. Before ovum maturation B. After mitosis of germinal cells C. After fertilization D. Before fertilization
Description : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .
Last Answer : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time ... False . D. If both Assertion & Reason are False.
Description : Assertion : Menarche starts around the age of puberty . Reason : After birth oocyte is matured and developed to form Graafian follicle .
Last Answer : Assertion : Menarche starts around the age of puberty . Reason : After birth oocyte is matured and ... D. If both Assertion & Reason are False.
Description : Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , Graafian follicle transforms in corpus luteum
Last Answer : Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , ... D. If both Assertion & Reason are False.
Description : Oocyte is liberated from ovary under the influence of LH, after completing
Last Answer : Oocyte is liberated from ovary under the influence of LH, after completing A. Meiosis and before ... . Meiosis II after release of first polar body
Description : A matured mammalian cell without nucleus is – (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte
Last Answer : (2) Erythrocyte Explanation: Mammalian erythrocytes are unique among the vertebrates as they are nonnucleated cells in their mature form. These cells have nuclei during early phases of ... lose all other cellular organelles such as their mitochondria, Golgi apparatus and endoplasmic reticulum.
Description : Which of the following events is not associated with ovulation in human female? (a) Release of secondary oocyte (b) LH surge (c) Decrease in estradiol (d) Full development of Graafian follicle
Last Answer : (c) Decrease in estradiol
Description : Meiotic division of the secondary oocyte is completed (a) prior to ovulation (b) at the time of copulation (c) after zygote formation (d) at the time of fusion of a sperm with an ovum.
Last Answer : (d) at the time of fusion of a sperm with an ovum.
Description : Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two ... genetic condition that may occur in a single family member as a result of spontaneous mutation.
Last Answer : a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes.
Description : A matured mammalian cell without nucleus is (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte
Last Answer : Erythrocyte
Description : Given below are four methods (A-D) and their modes of action (i-iv) in achieving contraception. Select their correct matching from the four options that follow. Method Mode of Action A. The pill (i) Prevents sperms reaching cervix B. Condom ... D - (ii) (d) A - (iv), B - (i), C - (ii), D - (iii)
Last Answer : A – (iii), B – (i), C – (iv), D – (
Description : What is the process of Spermatogenesis & Oogenesis -Biology
Last Answer : answer:
Description : Where does spermatogenesis occur? -Biology
Description : What is spermatogenesis ?
Last Answer : Spermatogenesis is the process by which haploid spermatozoa or sperm are produced from the seed cell in the seminiferous duct of the egg or testis.
Last Answer : Spermatogenesis is the process by which haploid spermatozoa or sperm are produced from seed cells in the seminiferous duct of the egg or testis.
Description : Arrange in correct sequence the structures formed during spermatogenesis a) spermatogonia b) Secondary spermatocyte c) Spermatogonial stem cells c) sp
Last Answer : Arrange in correct sequence the structures formed during spermatogenesis a) spermatogonia b) Secondary spermatocyte c) ... -d-e D. c-d-a-b-c
Description : During spermatogenesis, the diploid cells are
Last Answer : During spermatogenesis, the diploid cells are A. Primary spermatocyte and spermtogonium B. ... spermatid. D. Primary spermatocyte and spermatid.
Description : If spermatogenesis proceeds rapidly, inhibin is released. Inhibin reduces secretion of
Last Answer : If spermatogenesis proceeds rapidly, inhibin is released. Inhibin reduces secretion of A. ... Testerone D. Interstitial cell stimulating hormone.
Description : In mammals, spermatogenesis is stimulated by
Last Answer : In mammals, spermatogenesis is stimulated by A. MSH B. TSH C. ADH D. FSH.
Description : Hormone responsible for spermatogenesis is
Last Answer : Hormone responsible for spermatogenesis is A. Androgen B. Progesterone C. Testosterone D. None of these.
Description : Spermatogenesis changes
Last Answer : Spermatogenesis changes A. Spermatogonium into primary spermatocyte B. Primary spermatocyte into secondary ... into spermatid D. All the above.
Description : During spermatogenesis, the first meotic division occurs in
Last Answer : During spermatogenesis, the first meotic division occurs in A. Sertoli cells B. Spermatids C. Spermatozoans D. Primary spermatocytes
Description : Spermatogenesis occurs in
Last Answer : Spermatogenesis occurs in A. Vasa deferentia B. Epididymis C. Seminiferous tubules D. Penis.
Description : In spermatogenesis, reduction of chromosomes occurs during conversion of:
Last Answer : In spermatogenesis, reduction of chromosomes occurs during conversion of: A. Primary ... sperms D. Secodnary spermatocytes to spermatids.
Description : Spermatogenesis is formation of
Last Answer : Spermatogenesis is formation of A. Ovary B. Ovum C. Sperm D. Zygote.
Description : Which is the correct sequenc e in spermatogenesis?
Last Answer : Which is the correct sequenc e in spermatogenesis? A. Spermatogonia `rarr` Spermatids `rarr` ... spermatocytes `rarr` Spermatids `rarr` Spers.
Description : Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum . Reason : Spermatogenesis process requires les
Last Answer : Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum ... . D. If both Assertion & Reason are False.
Description : At which stage of spermatogenesis sperm acquire their whole structural maturity and they contain a haploid nucleus & other organs-
Last Answer : At which stage of spermatogenesis sperm acquire their whole structural maturity and they contain a ... C. Multiplication phase D. Maturation phase
Description : Correct order of spermatogenesis is :-
Last Answer : Correct order of spermatogenesis is :- A. Spermatocytes , Spermatogonia , Spermatid , Sperm B ... , Sec. Spermatocytes , Spermatid , Sperm
Description : The process of spermatogenesis and oogenesis in most vertebrates are under the influence of which hormone ?
Last Answer : The process of spermatogenesis and oogenesis in most vertebrates are under the influence of which hormone ? A. Oxytocin B. FSH C. ACTH D. ICSH
Description : Longest phase of spermatogenesis is :-
Last Answer : Longest phase of spermatogenesis is :- A. Multiplication phase B. Growth phase C. Maturation phase D. Germinal phase
Description : Acrosome formation in spermatogenesis occurs in which stage ?
Last Answer : Acrosome formation in spermatogenesis occurs in which stage ? A. First meiotic division B. Second meiotic division C. Growth phage D. Spermiogenesis
Description : Spermatogenesis process occur in
Last Answer : Spermatogenesis process occur in A. Rete testis B. Seminiferous Tubules C. Septula testis D. Mediastinum testis
Description : Spermatogenesis and sperm differentiation are under the control of
Last Answer : Spermatogenesis and sperm differentiation are under the control of A. FSH B. LH C. Progesterone D. Parathyroid Harmone
Description : Spermatogenesis is influenced by
Last Answer : Spermatogenesis is influenced by A. Progestrone B. FSH C. TSH D. LTH
Description : Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom. Endocrine Hormone Function/ gland Deficiency symptoms (a) ... child birth (d) Posterior Growth Oversecretion pituitary hormone stimulates (GH) abnormal growth
Last Answer : (a) Thyroid Thyroxine Lack of iodine gland in diet results in goitre
Description : Conversion of testosterone to dihydrotestosterone by the enzyme 5α-reductase is required for the following actions except: A. Formation of male external genitalia in the foetus B. Prostatic hypertrophy in elderly males C. Pubertal changes in the male adolescent D. Spermatogenesis
Last Answer : D. Spermatogenesis