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.

1 Answer

Answer :

(b) at time of fertilisation

Related questions

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 : 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 : 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 : (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 : Explain the mechanism of sex determination in humans. Or With the help of a flow chart explain in brief how the sex of a newborn is genetically determined in human beings. Which of the two parents, the mother or the father, is responsible for determination of sex of a child? -Biology

Last Answer : Mechanism of Sex Determination in Human Beings: In human beings, the sex of the individual is genetically determined.Sex determination is the process by which sex of a new born individual can be ... happens at fertilisation. Thus, father is responsible for the determination of the sex of a child.

Description : How is sex determined in human beings? -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 : The stage transferred into the uterus after induced fertilisation of ovum in the laboratory is (a) embryo at 4 blastomeres stage (b) embryo at 2 blastomeres stage (c) morula (d) zygote.

Last Answer : (c) morula

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 : Capacitation refers to changes in the (a) ovum after fertilisation (b) sperm after fertilisation (c) sperm before fertilisation (d) ovum before fertilisation.

Last Answer : (c) sperm before fertilisation

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 : 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 : (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 : 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 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

Last Answer : Ans:(a)

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 : In human beings, normally in which part, does the sperm fertilize the ovum? -Do You Know?

Last Answer : answer:

Description : human beings, normally in which part, does the sperm fertilize the ovum?

Last Answer : Fallopian tube

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 fertilisation in mammals including human beings takes place in

Last Answer : The fertilisation in mammals including human beings takes place in A. Vestibule B. Vagina C. Fallopian tubes D. Uterus

Description : Amniocentesis is a technique used - (1) to determine the sex of fetus (2) to test of amino acid (3) to test brain (4) None of the above

Last Answer : (1) to determine the sex of fetus Explanation: Amniocentesis (also referred to as amniotic fluid test) is a medical procedure used in prenatal diagnosis of chromosomal abnormalities and fetal infections, and also for sex determination.

Description : The permissible use of the technique amniocentesis is for (a) detecting sex of the unborn fetus (b) artificial insemination (c) transfer of embryo into the uterus of a surrogate mother (d) detecting any genetic abnormality.

Last Answer : (d) detecting any genetic abnormality.

Description : Which of the following cannot be detected in a developing fetus by amniocentesis? (a) Down’s syndrome (b) Jaundice (c) Klinefelter’s syndrome (d) Sex of the fetus

Last Answer : (b) Jaundice

Description : What eight letter word as c fifth letter and t as seventh letter?

Last Answer : allocate, veracity, dovecote, haircuts, monocyte, velocity, allocute

Description : Which five year plan focused on “Growth with social justice and equity”. A. Ninth Five Year Plan B. Eight Five Year Plan C. Seventh Five Year Plan D. Sixth Five Year Plan

Last Answer : A. Ninth Five Year Plan

Description : What term refers to the process in cells differentiate into layers with each layer ultimately forming distinct parts of the fetus?

Last Answer : Gastrulation

Description : Seven men, five women and eight children were given as assignment of distributing 2000 books to students in a school over a period of three days. All of them distributed books on the first day. One of the second ... distributed on the second day? a) 1000 b) 800 c) 650 d) 900 e) Cannot be determined

Last Answer : Answer: C Sol. Let the books distributed by man, a woman and a child be 5x, 4x and 2x respectively. ∴ No. of books distributed in 1st day = 7 5x+5 4x+8 2x=71x No. of books distributed in 2nd day =7 ... 2x=46x 71x + 57x + 46x = 2000, x = 2000/174 57x=2000/174 57= 655 650 (Approx)

Description : Do werewolves have dog genitals or human genitals?

Last Answer : Need answer

Description : Differentiate between ‘self-pollination’ and ‘cross-pollination’. Describe double fertilisation in plants. -Science

Last Answer : answer:

Description : .In Drosophila, the XXY condition leads to femaleness whereas in human beings the same condition leads to Klinefelter's syndrome in male. It proves (a) in human beings Y chromosome is active in ... (c) in Drosophila Y chromosome decides femaleness (d) Y chromosome of man have genes for syndrome.

Last Answer : (a) in human beings Y chromosome is active in sex determination

Description : A glass dome covering an area of 3-5 acres with 4000 representatives of most ecosystems and eight human beings in order to prepare a prototype of spac

Last Answer : A glass dome covering an area of 3-5 acres with 4000 representatives of most ecosystems and eight human ... B. phytotron C. Biosphere 1 D. Biosphere 2

Description : What, if anything, would you respond to someone who posts a pro-life video of a supposed 15 week fetus alive in its mother's arms?

Last Answer : I would not post anything at all. I would not have read it or watched it. I have my thoughts on pro life and I don’t discuss them with anyone.

Description : Genetic identity of a human male is determined by (a) sex-chromosome (b) cell organelles (c) autosome (d) nucleolus.

Last Answer : a) sex-chromosome

Description : Age 25. Within a few days of playing the MM kit, the fetus is lost. The age of the fetus is 1 month. Today I am bleeding for 5 days. The doctor told me to take medicine to stop the bleeding as there ... lost in these 5 days of bleeding ? And if the fetus is not numb, what is the way to remove it ?

Last Answer : Hopefully it's ruined. Currently you can eat it if you have excessive bleeding. Cap- Enclot / Frabex / Hemostat / Intrax 500 mg.

Description : How many days after playing MM kit the fetus is lost. The age of the fetus is 1 month. Today I am bleeding for 5 days. The doctor told me to take medicine to stop the bleeding as there is an ... bleeding as there is an infection in the tube. Will the fetus be lost in these 5 days of bleeding ?

Last Answer : Hopefully it's ruined. Currently you can eat it if you have excessive bleeding. Cap- Enclot / Frabex / Hemostat / Intrax 500 mg.

Description : The duration 19-21 days refers to: (1) incubation period of hen's egg (2) average life-span of a red blood cell in humans (3) the period of menstrual cycle soon after menstruation, during ... to occur (4) period of completion of one schizogony cycle of malarial parasite inside a red blood cell

Last Answer : (3) the period of menstrual cy-cle soon after menstruation, during which fertilisation is most likely to occur Explanation: The menstrual cycle is the scientific term for the physiological changes ... 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular

Description : The duration 19-21 days refers to: (1) incubation period of hen's egg (2) average life-span of a red blood cell in humans (3) the period of menstrual cycle soon after menstruation, during ... to occur (4) period of completion of one schizogony cycle of malarial parasite inside a red blood cell

Last Answer : the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur

Description : Is it a crime to grab women's genitals in Alabama?

Last Answer : Figures coming from a place that they think it’s fine to marry your sister or cousin .

Description : When did "junk" become the noun for male genitals?

Last Answer : answer:I think it's the property of male genitals to be lumpy. In this case: 2. transf. A piece or lump of anything; a CHUNK. [Chunk may have originated under the joint influence of chuck and ... E. BRADDON J. Haggard's Dau. xxiii. 243 The huge junk of single Gloucester. (Oxford English Dictionary)

Description : How can I keep young kittens from suckling on each other's genitals?

Last Answer : answer:You can't, you just have to separate them. I've raised >100 kittens over the years, and the ones that are orally fixated just can't be stopped. (I even tried a doomed but hilarious experiment where I ... would latch on to it. No luck, but it was very funny in a vaguely kinky sort of way.)

Description : Is there anything you feel so strongly about that you would sacrifice your genitals for the cause?

Last Answer : I'm not so sure about that. Maybe if one of my family members (the ones I truly care for), loved ones, etc were going to be summoned to death for something and I had the chance to change ... precious parts (which would be a weird sacrifice for someone to give me) but other than that. Not really.

Description : Why did my dog's genitals appear droopy and swollen almost overnight?

Last Answer : too young for puberty sounds like an injury or irritation/infection. Does she act sensitive?

Last Answer : wife The genitals Says Archigonium

Description : Why don't i feel comfortable with my genitals?

Last Answer : The only thing that I can suggest is to have a consultation with a shrink. It is better to know what is really going on to you. The shrink can tell more specifically in regard to physical, mental, sexual, etc. I am sure you can find the real answer from an expert.

Description : What is meant when it is said that beings of the phylum Annelida are vascular beings? From which other phyla of the animal kingdom does this feature differentiate them?

Last Answer : The classification of these beings as vascular beings means that they have a circulatory system, with vessels that distribute substances throughout the body. Poriferans, cnidarians and flatworms do ... system. In nematodes there is circulation of gases and nutrients through the pseudocoelom fluid.

Description : Which are the morphological features that differentiate the beings of the phylum Annelida from nematodes and platyhelminthes?

Last Answer : Platyhelminthes are worms with flat bodies (flatworms), nematodes are worms with cylindrical but not segmented bodies (roundworms). Annelids are cylindrical worms with segmented bodies (they are metameric).

Description : ”The sex of the children is determined by what they inherit from their father and not their mother.” Justify. -Biology

Last Answer : It is because a child who inherits an X chromosome from her father will be a girl and one who inherits a Y chromosome from his father will be a boy. But all children inherit a X chromosome from their mother regardless of whether they are boys or girls.

Description : Foetal sex can be determined by examining cells from the amniotic fluid by looking for

Last Answer : Foetal sex can be determined by examining cells from the amniotic fluid by looking for A. Chiasmata B. Autosomes C. Sex-chromosomes D. Nucleus