How does fertilisation take place? Fertilisation occurs once in a month. Comment. -Biology

How does fertilisation take place? Fertilisation occurs once in a month. Comment. -Biology
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Fusion of male gamete sperm and female gamete egg in fallopian tube (oviduct) is called as fertilization. ... Ovulation is release of ovum from ovary into oviduct and takes place only once in a month i.e. 14th day of menstrual cycle. Hence, fertilization can occur only once in a month.
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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.

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Last Answer : (b) after entry of sperm but before fertilisation

The example of hermaphrodite animal in which cross fertilisation occurs is?

Description : The example of hermaphrodite animal in which cross fertilisation occurs is?

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The example of hermaphrodite animal in which cross fertilisation occurs is (1) Hydra (2) Ascaris (3) Earthworm (4) Silkworm

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Last Answer : ANS (a) (i) OVARY (ii) FALLOPIAN TUBE (iii) AMPULLA-ISTHAMUS JUNCTION OF FALLOPIAN TUBE (iv) ENDOMETRIUM LINING OF UTERUS (b) HUMAN CHORIONIC GONADOTROPIN AND HUMAN PLACENTAL LACTOGEN

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The fertilisation in mammals including human beings takes place in

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Fertilisation taking place outside the body of the organism is called

Description : Fertilisation taking place outside the body of the organism is called

Last Answer : external fertilisation.

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Where does fertilisation occur in humans? Explain the events that occur during this process. -Biology

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Explain external fertilisation in organisms. -Biology

Description : Explain external fertilisation in organisms. -Biology

Last Answer : answer:

Explain the disadvantages of external fertilisation in organisms. -Biology

Description : Explain the disadvantages of external fertilisation in organisms. -Biology

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Explain the post-fertilisation changes in a flower. -Biology

Description : Explain the post-fertilisation changes in a flower. -Biology

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On facebook if you comment on someone's post then delete it are they still notified that you wrote it in the first place?

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

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Which type of the fruit formed without fertilisation? -Do You Know?

Description : Which type of the fruit formed without fertilisation? -Do You Know?

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Carbon dioxides fertilisation effect is

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Cleavage is a succession of rapid cell division that follow fertilisation . During cleavage.

Description : Cleavage is a succession of rapid cell division that follow fertilisation . During cleavage.

Last Answer : Cleavage is a succession of rapid cell division that follow fertilisation . During cleavage ... increases nor decreases but forms blasmtomeres.

Development of fruite without fertilisation is

Description : Development of fruite without fertilisation is

Last Answer : Development of fruite without fertilisation is A. Parthenogensis B. Parthenocarpy C. Apospory D. Apogamy

Assertion : From day 10 to 17 of the mentrual cycle is called fertile period. Reason : As chances of fertilisation are very high during this period.

Description : Assertion : From day 10 to 17 of the mentrual cycle is called fertile period. Reason : As chances of fertilisation are very high during this period.

Last Answer : Assertion : From day 10 to 17 of the mentrual cycle is called fertile period. Reason : As chances of ... . D. If both Assertion & Reason are False.

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

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What is common to the techniques (i) in vitro fertilisation, (ii) Cryopreservation and (iii) tissue culture?

Description : What is common to the techniques (i) in vitro fertilisation, (ii) Cryopreservation and (iii) tissue culture?

Last Answer : What is common to the techniques (i) in vitro fertilisation, (ii) Cryopreservation and (iii ... All are methods of conservation of extinct organisms.

A test tube baby means : (1) a baby grown in a test tube. (2) embryo fertilised in uterus and developed in test tube. (3) embryo fertilised and developed in uterus. (4) fertilisation in vitro and then transplantation in the uterus.

Description : A test tube baby means : (1) a baby grown in a test tube. (2) embryo fertilised in uterus and developed in test tube. (3) embryo fertilised and developed in uterus. (4) fertilisation in vitro and then transplantation in the uterus.

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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 which fertilisation is most likely to occur (4) period of completion of one schizogony cycle of malarial parasite inside a red blood cell

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

Which of the following correctly explains the phenomenon of "Test Tube Bally"? (1) When every process of embryo formation is in the test tube. (2) When the embryo develops in a test tube. (3) When the fertilisation is external and development is internal. (4) When the fertilisation is internal and development is external.

Description : Which of the following correctly explains the phenomenon of "Test Tube Bally"? (1) When every process of embryo formation is in the test tube. (2) When the embryo develops in a test tube ... is external and development is internal. (4) When the fertilisation is internal and development is external.

Last Answer : (3) When the fertilisation is external and development is internal. Explanation: Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg ... ) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.

Which type of the fruit formed without fertilisation?

Description : Which type of the fruit formed without fertilisation?

Last Answer : Parthenocarpy

What is meant by external fertilisation? Give example.

Description : What is meant by external fertilisation? Give example.

Last Answer : Fertilisation taking place outside the body of the organism is called external fertilisation. Ex: Fishes, frog etc.

Cri-du-chat syndrome in humans is caused by the (a) trisomy of 21st chromosome (b) fertilisation of an XX egg by a normal Y-bearing sperm (c) loss of half of the short arm of chromosome 5 (d) loss of half of the long arm of chromosome 5.

Description : Cri-du-chat syndrome in humans is caused by the (a) trisomy of 21st chromosome (b) fertilisation of an XX egg by a normal Y-bearing sperm (c) loss of half of the short arm of chromosome 5 (d) loss of half of the long arm of chromosome 5.

Last Answer : (c) loss of half of the short arm of chromosome 5

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.

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

Which of the following statements is correct with reference to a test tube baby? (a) Fertilisation of the egg is effected outside the body; the fertilised egg is then placed in the womb of the mother where the gestation is completed. (b) Fertilisation of the egg is effected in the female genital tract. It is then taken out and grown in a large test tube. (c) A prematurely born baby is reared in an incubator. (d) Fertilisation of the egg and growth of the embryo are affected in a large test tube.

Description : Which of the following statements is correct with reference to a test tube baby? (a) Fertilisation of the egg is effected outside the body; the fertilised egg is then placed in the womb of the mother ... . (d) Fertilisation of the egg and growth of the embryo are affected in a large test tube.

Last Answer : (a) Fertilisation of the egg is effected outside the body; the fertilised egg is then placed in the womb of the mother where the gestation is completed.

The test tube baby means (a) fertilisation and development both in uterus (b) fertilisation in vitro and then transplantation in uterus (c) a baby grown in test tube (d) fertilised and developed embryo in test tube.

Description : The test tube baby means (a) fertilisation and development both in uterus (b) fertilisation in vitro and then transplantation in uterus (c) a baby grown in test tube (d) fertilised and developed embryo in test tube.

Last Answer : (b) fertilisation in vitro and then transplantation in uterus

In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube? (a) Embryo only, upto 8 cell stage (b) Either zygote or early embryo upto 8 cell stage(c) Embryo of 32 cell stage (d) Zygote only

Description : In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube? (a) Embryo only, upto 8 cell stage (b) Either zygote or early embryo upto 8 cell stage (c) Embryo of 32 cell stage (d) Zygote only

Last Answer : (b) Either zygote or early embryo upto 8 cell stage

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 canal is too narrow to allow passage for the sperms (d) who cannot provide suitable environment for fertilisation.

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

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.

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Last Answer : (c) morula

A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is (a) Gamete Internal Fertilisation and Transfer (b) Germ cell Internal Fallopian Transfer (c) Gamete Inseminated Fallopian Transfer (d) Gamete Intra Fallopian Transfer.

Description : A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is (a) Gamete Internal Fertilisation and Transfer (b) Germ cell Internal Fallopian Transfer (c) Gamete Inseminated Fallopian Transfer (d) Gamete Intra Fallopian Transfer.

Last Answer : (d) Gamete Intra Fallopian Transfer.