In humans the oocyte is maintained in a state of meiotic arrest by the secretion of

In humans the oocyte is maintained in a state of meiotic arrest by the secretion of
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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.
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(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

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.

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- Tertiary follicle - Forms Graafian follicle (c) B- Corpus luteum - Secretes estrogen (d) A- Primary oocyte - It is in the prophase I of the meiotic division

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

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.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.

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.

True statements about the pH of the extracellular fluid: a. in healthy people it is maintained between 7.4 and 7.5 b. is increased in hypovolaemic shock c. decreases following a cardiac arrest d. influences the binding of drugs to plasma proteins

Description : True statements about the pH of the extracellular fluid: a. in healthy people it is maintained between 7.4 and 7.5 b. is increased in hypovolaemic shock c. decreases following a cardiac arrest d. influences the binding of drugs to plasma proteins

Last Answer : . influences the binding of drugs to plasma proteins

In humans, at the end of the first meiotic division, the male germ cells differentiate into the

Description : In humans, at the end of the first meiotic division, the male germ cells differentiate into the

Last Answer : In humans, at the end of the first meiotic division, the male germ cells ... Spermatozonia C. Primary spermatocytes D. Secondary spermatocytes

n humans, at the end of the first meiotic division, the male germ cells differentiate into the (a) spermatids (b) spermatogonia (c) primary spermatocytes (d) secondary spermatocytes.

Description : n humans, at the end of the first meiotic division, the male germ cells differentiate into the (a) spermatids (b) spermatogonia (c) primary spermatocytes (d) secondary spermatocytes.

Last Answer : (d) secondary spermatocytes.

Continuedc secretion of milk is maintained by

Description : Continuedc secretion of milk is maintained by

Last Answer : Continuedc secretion of milk is maintained by A. Prolactin B. LH C. Relaxin D. TSH

Secodnary oocyte is formed

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

In spermatogenesis, a primary spermatocyta produce four similar sperms while in oognesis a primary oocyte forms

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.

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 .

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.

Assertion : Menarche starts around the age of puberty . Reason : After birth oocyte is matured and developed to form Graafian follicle .

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.

Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , Graafian follicle transforms in corpus luteum

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.

Oocyte is liberated from ovary under the influence of LH, after completing

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

A matured mammalian cell without nucleus is – (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte

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.

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

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

Egg is liberated from ovary in (a) secondary oocyte stage (b) primary oocyte stage (c) oogonial stage (d) mature ovum stage.

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

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 copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes. b) Huntingon Disease Huntington disease is one example of a germ-line mutation. c) Duchenne Muscular Dystrophy Duchenne muscular dystrophy, an inherited form of muscular dystrophy, is an example of a genetic caused by structural gene mutations. d) Marphan Syndrome Marphan Syndrome is a genetic condition that may occur in a single family member as a result of spontaneous mutation.

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.

A matured mammalian cell without nucleus is (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte

Description : A matured mammalian cell without nucleus is (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte

Last Answer : Erythrocyte

Assertion: Agriculture and aquacultures are man-maintained ecosystems. Reason: All biotic and abiotic factors are managed by humans in these ecosystem

Description : Assertion: Agriculture and aquacultures are man-maintained ecosystems. Reason: All biotic and abiotic factors are managed by humans in these ecosystem

Last Answer : Assertion: Agriculture and aquacultures are man-maintained ecosystems. Reason: All biotic and abiotic factors ... and Reason are false, then mark (4)

what is difference between mitotic and meiotic interphase ? -Biology

Description : what is difference between mitotic and meiotic interphase ? -Biology

Last Answer : answer:

Variations during mutations of meiotic recombinations are

Description : Variations during mutations of meiotic recombinations are

Last Answer : Variations during mutations of meiotic recombinations are A. Random and directionless B. Randonm and ... and small D. Randonm, small adn directional

Each secondary spermatocyte after second meiotic division produces

Description : Each secondary spermatocyte after second meiotic division produces

Last Answer : Each secondary spermatocyte after second meiotic division produces A. Four haploid spermatids B. ... haploid spermatids D. Two diploid spermatids.

Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce.

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

First meiotic division during Oogenesis occurs in:

Description : First meiotic division during Oogenesis occurs in:

Last Answer : First meiotic division during Oogenesis occurs in: A. First polar body B. Second polar body C. Primary oocytes D. Secondary polar body

How many meiotic divisions are required during the formation of 500 zzygotes, if in males one meiotic division result in formation of four male gamete

Description : How many meiotic divisions are required during the formation of 500 zzygotes, if in males one meiotic division result in formation of four male gamete

Last Answer : How many meiotic divisions are required during the formation of 500 zzygotes, if in males one meiotic division ... A. 625 B. 500 C. 1000 D. 2500

Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain associated at their centrometres. Or In whic

Description : Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain associated at their centrometres. Or In whic

Last Answer : Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain ... II C. Metaphase I D. Metaphase II

In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores

Description : In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores

Last Answer : Ans. ((d))

Neurospora is used as genetic material because (a) It has short life cycle of 10 days (b) The product of single meiosis can be easily analysed (c) Meiotic products are linearly arranged in the form of ordered tetrads (d) Is a diploid fungus

Description : Neurospora is used as genetic material because (a) It has short life cycle of 10 days (b) The product of single meiosis can be easily analysed (c) Meiotic products are linearly arranged in the form of ordered tetrads (d) Is a diploid fungus

Last Answer : Ans:(a)

Crossing over is followed by a. Meiotic division I b. Meiotic division II, c. Both d. None

Description : Crossing over is followed by a. Meiotic division I b. Meiotic division II, c. Both d. None

Last Answer : Both

Total number of meiotic divisions required for forming 100 zygotes/100 grains of wheat is (a) 100 (b) 75 (c) 125 (d) 50

Description : Total number of meiotic divisions required for forming 100 zygotes/100 grains of wheat is (a) 100 (b) 75 (c) 125 (d) 50

Last Answer : (c) 125

Number of meiotic divisions required to produce 200/400 seeds of pea would be (a) 200/400 (b) 400/800 (c) 300/600 (d) 250/500

Description : Number of meiotic divisions required to produce 200/400 seeds of pea would be (a) 200/400 (b) 400/800 (c) 300/600 (d) 250/500

Last Answer : (d) 250/500.

In grasses what happens in microspore mother cell for the formation of mature pollen grains? (a) One meiotic and two mitotic divisions (b) One meiotic and one mitotic divisions (c) One meiotic division (d) One mitotic division

Description : In grasses what happens in microspore mother cell for the formation of mature pollen grains? (a) One meiotic and two mitotic divisions (b) One meiotic and one mitotic divisions (c) One meiotic division (d) One mitotic division

Last Answer : (b) One meiotic and one mitotic divisions

Megaspores are produced from the megaspore mother cells after (a) mitotic division (b) formation of thick wall (c) differentiation (d) meiotic division.

Description : Megaspores are produced from the megaspore mother cells after (a) mitotic division (b) formation of thick wall (c) differentiation (d) meiotic division.

Last Answer : d) meiotic division.

Offsets are produced by (a) meiotic divisions (b) mitotic divisions (c) parthenocarpy (d) parthenogenesis

Description : Offsets are produced by (a) meiotic divisions (b) mitotic divisions (c) parthenocarpy (d) parthenogenesis

Last Answer : b) mitotic divisions

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres. (a) Metaphase I (b) Metaphase II (c) Anaphase I (d) Anaphase I

Description : Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres. (a) Metaphase I (b) Metaphase II (c) Anaphase I (d) Anaphase I

Last Answer : (c) Anaphase I

How many meiotic divisions are required to produce 200 microspores from functional microspore mother cell

Description : 1. How many meiotic divisions are required to produce 200 microspores from functional microspore mother cell ? a) 400 b) 50 c) 200 d) 100

Last Answer : b) 50

Offsets are produced by (1) Meiotic divisions (2) Mitotic divisions (3) Parthenocarpy (4) Parthenogenesis

Description : Offsets are produced by (1) Meiotic divisions (2) Mitotic divisions (3) Parthenocarpy (4) Parthenogenesis

Last Answer : (2) Mitotic divisions

Anaphase in second meiotic division is characterized by:

Description : 26. Anaphase in second meiotic division is characterized by: (a) Separation of non-homologous chromosomes (b) Separation of homologous chromosomes (c) Separation of chromatids (d) All of them

Last Answer : Answer: c Separation of chromatids

What is correct to say about the hormone action in humans? (a) Glucagon is secreted by β-cells of islets of Langerhans and stimulates glycogenolysis. (b) Secretion of thymosins is stimulated with aging. (c) In females, FSH first binds with specific receptors on ovarian cell membrane. (d) FSH stimulates the secretion of estrogen and progesterone.

Description : What is correct to say about the hormone action in humans? (a) Glucagon is secreted by β-cells of islets of Langerhans and stimulates glycogenolysis. (b) Secretion of thymosins is stimulated ... receptors on ovarian cell membrane. (d) FSH stimulates the secretion of estrogen and progesterone.

Last Answer : (c) In females, FSH first binds with specific receptors on ovarian cell membrane.

Injury to vagus nerve in humans is not likely to affect (a) tongue movements (b) gastrointestinal movements (c) pancreatic secretion (d) cardiac movements.

Description : Injury to vagus nerve in humans is not likely to affect (a) tongue movements (b) gastrointestinal movements (c) pancreatic secretion (d) cardiac movements.

Last Answer : (a) tongue movements

What is correct to say about the hormone action in humans ? (1) FSH stimulates the secretion of estrogen and progesterone (2) Glucagon is secreted by -cells of Islets of Langerhans and stimulates glycogenolysis (3) Secretion of thymosins is stimulated with aging (4) If females, FSH first binds with specific receptors on ovarian cell membrane

Description : What is correct to say about the hormone action in humans ? (1) FSH stimulates the secretion of estrogen and progesterone (2) Glucagon is secreted by -cells of Islets of Langerhans and ... stimulated with aging (4) If females, FSH first binds with specific receptors on ovarian cell membrane

Last Answer : (4) If females, FSH first binds with specific receptors on ovarian cell membrane

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Suppose you were in a room and Donald Trump came up and grabbed your crotch. So you pulled out your pepper spray / mace and sprayed him. Would the Secret Service arrest you or him?

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