Description : What happens during fertilisation in humans after many sperms reach close to the ovum? (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. (b) All sperms except ... all the sperms except one. (d) Only two sperms nearest the ovum penetrate zona pellucida.
Last Answer : (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida.
Description : Bryophytes are dependent on water, because (a) water is essential for their vegetative propagation (b) the sperms can easily reach upto egg in the archegonium (c) archegonium has to remain filled with water for fertilization (d) water is essential for fertilization for their homosporous nature.
Last Answer : (b) the sperms can easily reach upto egg in the archegonium
Description : Identical twins are born when (a) Two sperms fertilise one ovum (b) Two sperms fertilise two ovums simultaneously (c) Open sperm fertilizes the ovum and zygote divides into two separate cells developing independently (d) One sperm fertilises two ovums
Last Answer : Ans:(c)
Description : An abnormal human baby with ‘XXX’ sex chromosomes was born due to (a) fusion of two ova and one sperm (b) fusion of two sperms and one ovum (c) formation of abnormal sperms in the father (d) formation of abnormal ova in the mother.
Last Answer : (d) formation of abnormal ova in the mother.
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 : Fertilisation in humans is practically feasible only if (a) the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix (b) the sperms are transported ... the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube.
Last Answer : (d) the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube.
Description : Fertilization of ovum occur in
Last Answer : Fertilization of ovum occur in A. Fimbriae of oviduct B. Isthmus of oviduct C. Ampulla of oviduct D. None of the above.
Description : The part where fertilization of ovum occurs in placental mammals is :
Last Answer : The part where fertilization of ovum occurs in placental mammals is : A. Ovary B. Uterus C. Vagina D. Fallopian tube
Description : In test-tube babies, the - (1) Ovum is fertilized and developed in testtubes (2) Ovum is fertilized in the test-tubes and developed in uterus (3) Ovum is fertilized in the uterus and developed in test-tubes (4) Ovum is developed without fertilization in test-tubes
Last Answer : (2) Ovum is fertilized in the test-tubes and developed in uterus Explanation: In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process ... zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
Description : Fertilization of the ovum by the sperm usually occurs in the: a) oviduct b) vagina c) uterus d) ovary
Last Answer : ANSWER: A -- OVIDUCT
Description : In test-tube babies, the (1) Ovum is fertilized and developed in test-tubes (2) Ovum is fertilized in the testtubes and developed in uterus (3) Ovum is fertilized in the uterus and developed in testtubes (4) Ovum is developed without fertilization in test-tubes
Last Answer : Ovum is fertilized in the testtubes and developed in uterus
Description : What happens to polar nuclei after fertilization? -Biology
Last Answer : answer:
Description : What happens a few days after fertilization?
Last Answer : the embryo attaches the mother
Description : What happens after fertilization ?
Last Answer : After fertilization, the uterus becomes a result.
Description : What happens at fertilization after gametes experiance meiosis?
Last Answer : The development of a new progeny organism is then initiated by the fusion of these gametes at fertilization
Description : Explain the events that occur during fertilisation of an ovum in humans. How is it that only one sperm enters the OVUm? -Biology
Last Answer : (i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (a) The sperm reaches the ... that blocks the entry of additional sperms. This ensures that only one sperm can fertilise an ovum
Description : How is the entry of only one sperm ensured into an ovum during fertilisation in humans? -Biology
Last Answer : During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes (depolarisation) in the membrane that blocks the entry of additional sperms. This ensures that only one sperm can fertilise an ovum
Description : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of polarbodies is to bring haploidy of ovum .
Last Answer : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of ... . If both Assertion & Reason are False.
Description : Which one of the following is the correct matching of the events occurring during menstrual cycle? (a) Proliferative phase : Rapid regeneration of myometrium and maturation of Graafian follicle (b) ... ) Ovulation : LH and FSH attain peak level and sharp fall in the secretion of progesterone
Last Answer : (b) Secretory phase : Development of corpus luteum and increased secretion of progesterone
Description : Endosperm is formed during the double fertilisation by (a) two polar nuclei and one male gamete (b) one polar nuclei and one male gamete (c) ovum and male gamete (d) two polar nuclei and two male gametes.
Last Answer : (a) two polar nuclei and one male gamete
Description : Walton Food Products decided to use agents to reach industrial accounts several years ago. Logically, this decision was based on which one of the following? A)Steady demand for the firm's ... C)Walton's desire to reduce selling costs D)The willingness of agents to provide market information
Last Answer : C)Walton's desire to reduce selling costs
Description : Which of the following depicts the correct pathway of transport of sperms
Last Answer : Which of the following depicts the correct pathway of transport of sperms A. Efferent ductules `to ... deferens `to` Efferent ductules `to` Epidiymis
Description : Release of sperms from seminiferous tubules is called
Last Answer : Release of sperms from seminiferous tubules is called A. Spermiogenesis B. Spermiation C. Spermatogenesis D. Fertilization.
Description : How many sperms are present in an average 3 ml ejaculation
Last Answer : How many sperms are present in an average 3 ml ejaculation A. 200 million B. 300 million C. 500 million D. 800million.
Description : Sperms develop in
Last Answer : Sperms develop in A. Vas deferens B. Seminiferous tubules C. Prostate gland D. Interstital cells.
Description : Sperms are produced in:
Last Answer : Sperms are produced in: A. vas deferens B. Interstitial cells C. Prostate gland D. Seminiferous tubules.
Description : Which provides nutrition to maturing sperms?
Last Answer : Which provides nutrition to maturing sperms? A. Leydig cells B. Scrotum C. Epididymis D. Sertoli cells.
Description : Process of maturation and evelopment of sperms is
Last Answer : Process of maturation and evelopment of sperms is A. Spermatogenesis B. Spermiogenesis C. Oogenesis D. Spermiation.
Description : If a germ cell in a female gonad and a germ cell in a male gonad begin undergoing meiosis simultan eousely, what will be the ratio of ova and sperms p
Last Answer : If a germ cell in a female gonad and a germ cell in a male gonad begin undergoing meiosis simultan eousely, what will be ... `1:2` C. `1:4` D. `2:1`
Description : How many sperms are formed from a secondary spermatocyte?
Last Answer : How many sperms are formed from a secondary spermatocyte? A. 4 B. 8 C. 2 D. 1
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 : 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 : In spermatogenesis, a primary spermatocyta produce four similar sperms while in oognesis a primary oocyte forms
Last Answer : In spermatogenesis, a primary spermatocyta produce four similar sperms while in oognesis a primary oocyte ... One large ovum and 2-3 polar bodies.
Description : $ Clitoris of woman is equivalent to the penis of men. ! The process of formation of sperms is called spermatogensis.
Last Answer : $ Clitoris of woman is equivalent to the penis of men. ! The process of formation of sperms is called ... is wrong D. If both As and R are wrong.
Description : $ Sperm in Bryophytes are flagellated. ! Sperms in bryophytes move to the mature and dehisced archegonia, under the effect of chemicals.
Last Answer : $ Sperm in Bryophytes are flagellated. ! Sperms in bryophytes move to the mature and dehisced archegonia, under ... D. If both As and R are wrong.
Description : The functional maturation of sperms takes place in :-
Last Answer : The functional maturation of sperms takes place in :- A. Oviduct B. Epididymis C. Vagina D. All of these
Description : The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
Last Answer : The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature ... . Spermatogonia - Spermatocyte - Spermatid - Sperms
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 : Sperms and ova are
Last Answer : Sperms and ova are A. Ectodermal in origin B. Mesodermal in origin C. Endodermal in origin D. All of the above
Description : Assertion: Copper-T is an effectie contraceptive device in human females. Reason: Copper-T prevents passage of sperms from vagina upwards into fallopi
Last Answer : Assertion: Copper-T is an effectie contraceptive device in human females. Reason: Copper-T prevents ... If both the assertion and resson are false.
Description : S1 nuclease hydrolyses (A) DNA of somatic cells (B) DNA of sperms (C) Any double stranded DNA (D) Any single stranded DNA
Last Answer : Answer : D
Description : By which the sex of a child is determined before birth? (1) Sperms of father (2) Foetus of mother (3) Both (1) and (2) (4) Nutrition of mother
Last Answer : (2) Foetus of mother Explanation: The gender of the baby can be ascertained accurately after more or less than seven weeks of pregnancy. During this period of pregnancy, the fetal DNA is ... in the mother's blood. Thus, identifying the fetus gender through prenatal gender testing is easier.
Description : A male human is heterozygous for autosomal genes A and B and is also hemizygous for haemophilic gene h. What proportion of his sperms will be abh? (a) 1/8 (b) 1/32 (c) 1/16 (d) 1/4
Last Answer : (a) 1/8
Description : Mr. Kapoor has Bb autosomal gene pair and d allele sex-linked. What shall be proportion of Bd in sperms? (a) Zero (b) 1/2 (c) 1/4 (d) 1/8
Last Answer : (c) 1/4
Description : . Select the incorrect statement. (a) Human males have one of their sex-chromosome much shorter than other. (b) Male fruit fly is heterogametic. (c) In male grasshoppers, 50% of sperms have no sex-chromosome. (d) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.
Last Answer : (d) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.
Description : A human male produces sperms with the genotypes AB, Ab, aB and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person? (a) AaBB (b) AABb (c) AABB (d) AaBb
Last Answer : (d) AaBb
Description : Artificial Insemination means (a) artificial introduction of sperms of a healthy donor into the vagina (b) introduction of sperms of a healthy donor directly into the ovary (c) transfer of sperms of a ... of sperms of husband to a test tube containing ova. (NEET 2013) 40. The stage transferred
Last Answer : (a) artificial introduction of sperms of a healthy donor into the vagina
Description : What is the work of progesterone which is present in oral contraceptive pills? (a) To inhibit ovulation (b) To check oogenesis (c) To check entry of sperms into cervix and to make them inactive (d) To check sexual behaviour
Last Answer : (a) To inhibit ovulation
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 – (