Variations during mutations of meiotic recombinations are

Variations during mutations of meiotic recombinations are
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Variations during mutations of meiotic recombinations are A. Random and directionless B. Randonm and ... and small D. Randonm, small adn directional
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According to Hugo de Vries, the mechanism of evolution is :- (1) Multiple step mutations (2) Saltation (3) Phenotypic variations (4) Minor mutations

Description : According to Hugo de Vries, the mechanism of evolution is :- (1) Multiple step mutations (2) Saltation (3) Phenotypic variations (4) Minor mutations

Last Answer : (2) Saltation

Which statement best explains the evolutionary advantage of meiosis? (a) Meiosis is necessary for sexual reproduction. (b) Genetic recombinations are possible from generation to generation. (c) Meiosis alternates with mitosis from generation to generation. (d) The same genetic system is passed on from generation to generation.

Description : Which statement best explains the evolutionary advantage of meiosis? (a) Meiosis is necessary for sexual reproduction. (b) Genetic recombinations are possible from generation to generation. (c) Meiosis ... to generation. (d) The same genetic system is passed on from generation to generation.

Last Answer : (b) Genetic recombinations are possible from generation to generation.

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

(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.

what is difference between mitotic and meiotic interphase ? -Biology

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

Last Answer : answer:

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.

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

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

Last Answer : 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.

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

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

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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

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.

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.

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

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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

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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

Is it true mutations can only occur during interphase?

Description : Is it true mutations can only occur during interphase?

Last Answer : Need answer

Why do they track genetic mutations, or changes, back on the mother's line?

Description : Why do they track genetic mutations, or changes, back on the mother's line?

Last Answer : Because Mitochondrial DNA, unlike nuclear DNA, is inherited from the mother, while nuclear DNA is inherited from both parents.

If certain plants mutated, which mutations would cause more impact for society?

Description : If certain plants mutated, which mutations would cause more impact for society?

Last Answer : answer:When I first read the main question I had all sorts of positive scenarios in mind like Honey Crisp apples being able to grow in Florida and Vidalias having a longer growing season. With ... to control crops more, maybe have more hydroponic farms where bad crops can't contaminate good ones.

What are induced mutations? -Biology

Description : What are induced mutations? -Biology

Last Answer : answer:

Difference between spontaneous and induced mutations? -Biology

Description : Difference between spontaneous and induced mutations? -Biology

Last Answer : answer:

Mutations in HIV virus. -Biology

Description : Mutations in HIV virus. -Biology

Last Answer : answer:

Where do germline mutations occur? -Biology

Description : Where do germline mutations occur? -Biology

Last Answer : answer:

Where do germline mutations occur? -Biology

Description : Where do germline mutations occur? -Biology

Last Answer : answer:

How do mutations occur in plants?

Description : How do mutations occur in plants?

Last Answer : First and foremost mutation refers to the change in the structure of the gene.Mutation in plants causes a change in the appearance of flowers, stem and the fruits of the plant. A plant might change ... completely. If the plant is allowed to grow, this gene might be transfered to the next generation.

Assertion :- According to Hugo de Vries , it is mutation which causes speciation and hence called it saltation. Reason :- Mutations are random and dir

Description : Assertion :- According to Hugo de Vries , it is mutation which causes speciation and hence called it saltation. Reason :- Mutations are random and dir

Last Answer : Assertion :- According to Hugo de Vries , it is mutation which causes speciation and hence called it ... . D. If both Assertion & Reason are false.

The idea of mutations was brought forth by

Description : The idea of mutations was brought forth by

Last Answer : The idea of mutations was brought forth by A. Hardy Weinberg, who worked on allele frequencies in a ... D. Gregor Mendel, who worked on Pisum sativum

Which of the following statements is not true for cancer cells is relation to mutations ?

Description : Which of the following statements is not true for cancer cells is relation to mutations ?

Last Answer : Which of the following statements is not true for cancer cells is relation to mutations ? ... cell cycle D. Mutations destroy telomerase inhibitors

Most of the mutations remain unexpressed because they are

Description : Most of the mutations remain unexpressed because they are

Last Answer : Most of the mutations remain unexpressed because they are A. Too small B. Very significant C. Very few D. Mostly recessive

Gene mutations occurs in

Description : Gene mutations occurs in

Last Answer : Gene mutations occurs in A. Chromosomes B. DNA C. RNA D. Nucleus

How do mutations affect the proteins that are formed?

Description : How do mutations affect the proteins that are formed?

Last Answer : How can DNA control the production of proteins

What is the significance of mutation and repair of mutations to evolution of sexual reproduction?

Description : What is the significance of mutation and repair of mutations to evolution of sexual reproduction?

Last Answer : meow

What is it called when mutations that cause a cell to divide uncontrollably that can lead to grow?

Description : What is it called when mutations that cause a cell to divide uncontrollably that can lead to grow?

Last Answer : Feel Free to Answer

When does DNA polymers check mutations?

Description : When does DNA polymers check mutations?

Last Answer : Feel Free to Answer

When does. DNA polymerase check for mutations?

Description : When does. DNA polymerase check for mutations?

Last Answer : During DNA replication

What effect do MOST mutations have on an organism?

Description : What effect do MOST mutations have on an organism?

Last Answer : What is the answer ?

If one or more of these mutations occurs in the genes of reproductive cells how might the traits of offspring be affected?

Description : If one or more of these mutations occurs in the genes of reproductive cells how might the traits of offspring be affected?

Last Answer : Need answer

What is a mutations hunger games?

Description : What is a mutations hunger games?

Last Answer : Need answer

How could genetic mutations lead to health disorders and abnormalities?

Description : How could genetic mutations lead to health disorders and abnormalities?

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What is the significance of mutation and repair of mutations to evolution of sexual reproduction?

Description : What is the significance of mutation and repair of mutations to evolution of sexual reproduction?

Last Answer : meow