Description : What is the structure and function of a human ovum(egg) cell? -Biology
Last Answer : answer:
Description : Which one of the following statements about human sperm is correct? (a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation. (b) The ... a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function
Last Answer : (b) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation.
Description : In human beings after fertilisation , the structure which gets embedded in the wall of uterus is a) ovum b)embryo c)foetus d)zygote
Last Answer : b)embryo
Description : Anyone had experience or seriously looked into freezing a reproductive egg (ovum)?
Last Answer : You may want to look at this article. It does not sound promising. Only two in 100 ova are viable on thawing, and they haven't even been fertilized or implanted yet. You can maybe produce as many as 20 eggs ... to find out about them. I wish you the best of luck. I hope you have the child you want.
Description : Extrusion of second polar body from egg occurs (a) simultaneously with first cleavage (b) after entry of sperm but before fertilisation (c) after fertilisation (d) before entry of sperm into ovum.
Last Answer : (b) after entry of sperm but before fertilisation
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 : (i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -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 ... endometrium of the uterus. This is called implantation.(iii) Blastocyst stage implants in the uterus.
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 : In human beings, normally in which part, does the sperm fertilize the ovum? -Do You Know?
Description : Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the age of fifty years . Reason : Human male having
Last Answer : Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the ... D. If both Assertion & Reason are False.
Description : What is the chromosome number in a human ovum? (1) 24 (2) 46 (3) 48 (4) None of these
Last Answer : (2) 46 Explanation: Chromosomes are long Stringy aggregates of genes that carry heredity information. They are composed of DNA and proteins and are located within the nucleus of our cells. Chromosomes determine ... for a total of 46. There are 22 pairs of autosomes and one pair of sex chromosomes.
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 : Sex is determined in human beings (a) by ovum (b) at time of fertilisation (c) 40 days after fertilisation (d) seventh to eight week when genitals differentiate in fetus.
Last Answer : (b) at time of fertilisation
Description : Match the following columns and select the correct option. Column-I Column-II (A) Placenta (i) Androgens (B) Zona pellucida (ii) Human Chorionic Gonadotropin (HCG) (C) Bulbourethral glands (iii) Layer of the ovum (D) Leydig cells (iv) ... (ii) (iii) (c) (iii) (ii) (iv) (i) (d) (ii) (iii) (iv) (i)
Last Answer : (d) (ii) (iii) (iv) (i)
Description : Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female? (a) Maintenance of the hypertrophical endometrial lining (b) ... the blood stream (c) Retention of well-developed corpus luteum (d) Fertilisation of the ovum
Last Answer : (b) Maintenance of high concentration of sex- hormones in the blood stream
Description : human beings, normally in which part, does the sperm fertilize the ovum?
Last Answer : Fallopian tube
Description : What is the chromosome number in a human ovum ? (1) 24 (2) 46 (3) 48 (4) None of these
Last Answer : 46
Description : Explain the steps in the formation of an ovum from an oogonium in humans. or Suggest and explain any three Assisted Reproductive Technologies (ART) to an infertile couple. -Biology
Last Answer : Three reproductive techniques for sterile couple are: (i) In vitro fertilisation The fertilisation outside the body in almost similar conditions as that in the body followed by embryo transfer to the ... to form an embryo in the laboratory in which a sperm is directly injected into the ovum.
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 : 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 : Why does a female frog produce hundreds of egg cells at a time but a female human produces only one egg cell at a time?
Last Answer : Feel Free to Answer
Description : Every multicellular organism, be it a microscopic alga, a banyan tree or a human being, starts as a single cell called a/an (a) Egg (b) Sperm (c) Nucleus (d) Gene
Last Answer : Ans:(a)
Description : 2. A human cell containing 22 autosomes and a Y chromosome is probably a a) somatic cell of male b) sperm cell c) somatic cell of female d) unfertilized egg cell
Last Answer : b) sperm cell
Description : Where is the ovum formed ?
Last Answer : The ovum is formed in the female germ cell.
Description : What are both ovum and sperm ?
Last Answer : : Both ovum and sperm are haploid
Description : What happens during fertilization when many sperms reach close to ovum
Last Answer : What happens during fertilization when many sperms reach close to ovum A. Cells of corona radiata trap ... the one nearest to ovum lose their tails.
Description : Second maturation division of mammalian ovum occurs
Last Answer : Second maturation division of mammalian ovum occurs A. Until after sperm has penetrated ovum B. ... after ovulation before entry into fallopian tube.
Description : Layers of an ovum from outside to inside is
Last Answer : Layers of an ovum from outside to inside is A. Coron a radiata, zona pellucida, ... radiats D. Zona pellucida,vitelline membranecorona radiata.
Description : Cytoplasm of ovum does not contain:
Last Answer : Cytoplasm of ovum does not contain: A. Golgi complex B. Mitochondria only C. Centrosome D. Ribosomes.
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 : Fusion of sperm and ovum is
Last Answer : Fusion of sperm and ovum is A. Amphimixis B. Regeneratin C. Fertilization `rarr` Cleavage `rarr` Zygote ... `rarr` Gastrula. D. None of the above.
Description : If mammalian ovum fails to get fertilised, which one of the following is unlikely?
Last Answer : If mammalian ovum fails to get fertilised, which one of the following is unlikely? A. ... rapidly declines D. Estrogen secretion further decreases.
Description : If an unfertilized ovum of frogs is pricked with a micro- needle , it will :
Last Answer : If an unfertilized ovum of frogs is pricked with a micro- needle , it will : A. Die immediately B. Start dividing C. Remain undivided D. None of these
Description : Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endom
Last Answer : Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona ... . If both Assertion & Reason are False.
Description : Assertion : Normally monospermy occurs in most of animals . Reason : Vitelline membrane of ovum checks polyspermy .
Last Answer : Assertion : Normally monospermy occurs in most of animals . Reason : Vitelline membrane of ovum checks ... D. If both Assertion & Reason are False.
Description : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . Reason : Diploid nuclear status of organism is essen
Last Answer : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . ... . D. If both Assertion & Reason are False.
Description : Assertion : The acrosomal secretions of sperm , help it in entering in the cytoplasm of the ovum . Reason : It contains sperm lysin .
Last Answer : Assertion : The acrosomal secretions of sperm , help it in entering in the cytoplasm of the ovum . ... . D. If both Assertion & Reason are False.
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 : Various changes in mammalian sperm which prepare it to fertilise the ovum are called :
Last Answer : Various changes in mammalian sperm which prepare it to fertilise the ovum are called : A. Capacitation B. Regeneration C. Growth D. None of these
Description : From a to d which of the following statements are correct ? (a) Fertilisation can occur only if the ovum and sperm are transported simultaneously to t
Last Answer : From a to d which of the following statements are correct ? (a) Fertilisation can occur only if the ovum and sperm ... b and c C. c and d D. b and d
Description : The second maturation division of the mammalian ovum occurs
Last Answer : The second maturation division of the mammalian ovum occurs A. In the Graafian follicle following the ... the sperm has fused with that of the ovum
Description : At the time of birth , ovum arrested is the form of :-
Last Answer : At the time of birth , ovum arrested is the form of :- A. Oogonia B. Primary oocyte C. Secondary oocytes D. Egg
Description : What will happen the lining of the uterus after day 28 if an ovum was fertilized?
Last Answer : Need answer
Description : What day in the cycle an ovum is most likely to be fertilized?
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 : The term Test Tube Baby' implies (a) Fertilisation of ovum takes place I the test tube but it develops in uterus (b) Fertilisation of ovum takes place in the test tube and develops in ... uterus but develops in the test tube (d) Fertilisation takes place in uterus and embryo develops in uterus
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 : The following are true about the DNA in mitochondria: a. they are found in the ovum and not the spermatozoan b. they have their own genome c. they are expressed in muscle cells d. all above
Last Answer : all above
Description : Test tube baby means a baby born when (a) it is developed in a test tube (b) it is developed through tissue culture method (c) the ovum is fertilised externally and thereafter implanted in the uterus (d) it develops from a non-fertilised uterus.
Last Answer : (c) the ovum is fertilised externally and thereafter implanted in the uterus