1.

Observations:differences between mitosis and meiosis.Main differenc

Answer»

Mitosisconsistsofone stage whereasmeiosisconsistsoftwo stages.Mitosisproduces diploid cells (46 chromosomes) whereasmeiosisproduces haploid cells (23 chromosomes).Mitosisproduces two identical daughter cells whereasmeiosisproduces four geneticallydifferentdaughter cells.

It is in science guide check it out

1. Mitosis occours in somatic cell and stem cell while meiosis occours in germ cell.2.ln mitosis deploid cells remain deploid while in meiosis deploid cells become haploid.

1.Mitosis occours in stem cell and somatic cell while meiosis occours in germ cell .2.ln mitosis deploid cells remain diploid while in meiosis deploid cells become haploid.

mitosis: involves division of body cellsdivision occur oncemeosis:involves division of sex cellsdivision occur twice

Mitosis1)it occurs in somatic cells2)daughter cells receives equal number of chromosomes 3)two daughter cells are formed at the end of mitosisMeiosis1)it occurs in germ cells2)the number of chromosomes in the daughter cell are reduced by half3)four daughter cells are formed at the end of meiosis

Organisms grow and reproduce through cell division. In eukaryoticcells, the production of new cells occurs as a result ofmitosisandmeiosis. These two nuclear division processes are similar but distinct. Both processes involve the division of adiploid cell, or a cell containing two sets ofchromosomes(one chromosome donated from each parent).

Inmitosis, the genetic material (DNA) in acellis duplicated and divided equally between two cells. The dividing cell goes through an ordered series of events called thecell cycle. The mitotic cell cycle is initiated by the presence of certain growth factors or other signals that indicate that the production of new cells is needed. Somaticcells of the bodyreplicate by mitosis. Examples of somatic cells includefat cells,blood cells, skin cells, or any body cell that is not asex cell. Mitosis is necessary to replace dead cells, damaged cells, or cells that have short life spans.

Meiosisis the process by whichgametes(sex cells) are generated in organisms thatreproduce sexually. Gametes are produced in male and femalegonadsandcontain one-half the number ofchromosomesas the original cell. Newgenecombinations are introduced in a population through thegenetic recombinationthat occurs during meiosis. Thus, unlike the two genetically identical cells produced in mitosis, the meiotic cell cycle produces four cells that are genetically different.

In mitosis, the genetic material (DNA) in a cell is duplicated and divided equally between two cells. The dividing cell goes through an ordered series of events called the cell cycle. The mitotic cell cycle is initiated by the presence of certain growth factors or other signals that indicate that the production of new cells is needed. Somatic cells of the body replicate by mitosis. Examples of somatic cells include fat cells, blood cells, skin cells, or any body cell that is not a sex cell. Mitosis is necessary to replace dead cells, damaged cells, or cells that have short life spans.

Meiosis is the process by which gametes (sex cells) are generated in organisms that reproduce sexually. Gametes are produced in male and female gonads and contain one-half the number of chromosomes as the original cell. New gene combinations are introduced in a population through the genetic recombination that occurs during meiosis. Thus, unlike the two genetically identical cells produced in mitosis, the meiotic cell cycle produces four cells that are genetically different.

Science, Tech, Math›Science

7 Differences Between Mitosis and Meiosis

Share

Flipboard

Email

These cervical cancer cells are dividing. Steve Gschmeissner / Science Photo Library / Getty Images

byRegina Bailey

Updated August 19, 2019

Organisms grow and reproduce through cell division. In eukaryoticcells, the production of new cells occurs as a result ofmitosisandmeiosis. These two nuclear division processes are similar but distinct. Both processes involve the division of adiploid cell, or a cell containing two sets ofchromosomes(one chromosome donated from each parent).

Inmitosis, the genetic material (DNA) in acellis duplicated and divided equally between two cells. The dividing cell goes through an ordered series of events called thecell cycle. The mitotic cell cycle is initiated by the presence of certain growth factors or other signals that indicate that the production of new cells is needed. Somaticcells of the bodyreplicate by mitosis. Examples of somatic cells includefat cells,blood cells, skin cells, or any body cell that is not asex cell. Mitosis is necessary to replace dead cells, damaged cells, or cells that have short life spans.

Meiosisis the process by whichgametes(sex cells) are generated in organisms thatreproduce sexually. Gametes are produced in male and femalegonadsandcontain one-half the number ofchromosomesas the original cell. Newgenecombinations are introduced in a population through thegenetic recombinationthat occurs during meiosis. Thus, unlike the two genetically identical cells produced in mitosis, the meiotic cell cycle produces four cells that are genetically different.

Key Takeaways: Mitosis vs Meiosis

Mitosisandmeiosisare nuclear division processes that occur during cell division.

Mitosis involves the division of body cells, while meiosis involves the division of sex cells.

The division of a cell occurs once in mitosis but twice in meiosis.

Two daughter cellsare produced after mitosis and cytoplasmic division, whilefour daughter cellsare produced after meiosis.

Daughter cells resulting from mitosis arediploid, while those resulting from meiosis arehaploid.

Daughter cells that are the product of mitosis are genetically identical. Daughter cells produced after meiosis are genetically diverse.

Tetradformation occurs in meiosis but not mitosis.

Differences Between Mitosis and Meiosis

Lily Anther Microsporocyte in Telophase II of Meiosis.Ed Reschke/Photolibrary/Getty Images

1. Cell Division

Mitosis:A somatic cell dividesonce. Cytokinesis (the division of thecytoplasm) occurs at the end oftelophase.

Meiosis:Areproductive celldividestwice. Cytokinesis happens at the end oftelophase Iand telophase II.

2. Daughter Cell Number

Mitosis:Twodaughter cells are produced. Each cell isdiploidcontaining the same number of chromosomes.

Meiosis:Fourdaughter cells are produced. Each cell ishaploidcontaining one-half the number of chromosomes as the original cell.

3. Genetic Composition

Mitosis:The resulting daughter cells in mitosis are genetic clones (they are genetically identical).Norecombinationor crossing over occur.

Meiosis:The resulting daughter cells contain different combinations of genes.Genetic recombination occursas a result of therandom segregationofhomologous chromosomesinto different cells and by the process of crossing over (transfer of genes between homologous chromosomes).

4. Length of Prophase

Mitosis:During the first mitotic stage, known as prophase,chromatincondenses into discrete chromosomes, the nuclear envelope breaks down, andspindle fibersform at opposite poles of the cell. A cell spends less time in prophase of mitosis thana cellin prophase I of meiosis.

Meiosis:Prophase I consists of five stages and lasts longer than prophase of mitosis. The five stages of meiotic prophase I are leptotene, zygotene, pachytene, diplotene, and diakinesis. These five stages do not occur in mitosis. Genetic recombination and crossing over take place during prophase I.

5. Tetrad Formation

Mitosis:Tetrad formation does not occur.

Meiosis:In prophase I, pairs of homologous chromosomes line up closely together forming what is called a tetrad. A tetrad consists of fourchromatids(two sets of sister chromatids).

6. Chromosome Alignment in Metaphase

Mitosis:Sister chromatids(duplicated chromosome comprised of two identical chromosomes connected at thecentromereregion) align at the metaphase plate (a plane that is equally distant from the two cell poles).

Meiosis:Tetrads (homologous chromosome pairs) align at the metaphase plate in metaphase I.

7. Chromosome Separation

Mitosis:During anaphase,sister chromatids separateand begin migrating centromere first toward opposite poles of the cell. A separated sister chromatid becomes known asdaughter chromosomeand is considered a full chromosome.

Meiosis:Homologous chromosomes migrate toward opposite poles of the cell during anaphase I.Sister chromatids do not separatein anaphase I.

MITOSIS1.Occurs in most of the cells except reproductive cells.2.parent cells divides once.MEIOSIS1.occurs only in reproductive cells. 2.parents cells divides twice.

mitosis consists of one stage whereas meiosis consists of two stages. mitosis produces diploid cells (46chromosomes)whereas meiosis produces diploid cells (23chromosomes ) mitosisproduces two identical daughter cells whereas meiosis produces four genetically different daughter cells

Following are the differences betweenMitosis and Meiosis:

S.N.

Differences

Mitosis

Meiosis

1Type of ReproductionAsexualSexual2GeneticallySimilarDifferent3Crossing OverNo, crossing over cannot occur.Yes, mixing of chromosomes can occur.4Number of DivisionsOneTwo5Pairing of HomologsNoYes6Mother CellsCan be either haploid or diploidAlways diploid7Number of Daughter Cells produced2 diploid cells4 haploid cells8Chromosome NumberRemains the same.Reduced by half.9Chromosomes PairingDoes Not OccurTakes place during zygotene of prophase I and continue upto metaphase I. 10CreatesMakes everything other than sex cells.Sex cells only: female egg cells or male sperm cells.11Takes Place inSomatic CellsGerm Cells12ChiasmataAbsentObserved during prophase I and metaphase I.13Spindle FibresDisappear completely in telophase.Do not disappear completely in telophase I.14NucleoliReappear at telophaseDo not reappear at telophase I.15StepsProphase, Metaphase, Anaphase, Telophase.(Meiosis 1) Prophase I, Metaphase I, Anaphase I, Telophase I; (Meiosis 2) Prophase II, Metaphase II, Anaphase II and Telophase II.16KaryokinesisOccurs in Interphase.Occurs in Interphase I.17CytokinesisOccurs in Telophase.Occurs in Telophase I and in Telophase II.18Centromeres SplitThe centromeres split during anaphase.The centromeres do not separate during anaphase I, but during anaphase II.19ProphaseSimpleComplicated20ProphaseDuration of prophase is short, usually of few hours.Prophase is comparatively longer and may take days.21SynapsisNo SynapsisSynapsis of Homologous chromosomes takes place during prophase.22Exchange of SegmentsTwo chromatids of a chromosome do not exchange segments during prophase.Chromatids of two homologous chromosome exchange segments during crossing over.23Discovered byWalther FlemmingOscar Hertwig24FunctionCellular reproduction and general growth and repair of the body.Genetic diversity through sexual reproduction.25FunctionTakes part in healing and repair.Takes part in the formation of gametes and maintenance of chromosome number.

mitosis, the genetic material (DNA) in acellis duplicated and divided equally between two cells. The dividing cell goes through an ordered series of events called thecell cycle. The mitotic cell cycle is initiated by the presence of certain growth factors or other signals that indicate that the production of new cells is needed. Somaticcells of the bodyreplicate by mitosis. Examples of somatic cells includefat cells,blood cells, skin cells, or any body cell that is not asex cell. Mitosis is necessary to replace dead cells, damaged cells, or cells that have short life spans.

Meiosisis the process by whichgametes(sex cells) are generated in organisms thatreproduce sexually. Gametes are produced in male and femalegonadsandcontain one-half the number ofchromosomesas the original cell. Newgenecombinations are introduced in a population through thegenetic recombinationthat occurs during meiosis. Thus, unlike the two genetically identical cells produced in mitosis, the meiotic cell cycle produces four cells that are genetically different.

Mitosis:-A type of cell division that results in two daughters cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

Meiosis:-A type of cell division that results in four daughter cells each with half tha number of chromosomes of the parent cell,as in the production of gametes and plant spores.

mitosis:1.occurs only in vegetative cells2.parent cell divides only once3.Two daughter cells are formed4.Each daughter cell possess chromosomes which are equal and identical to parental chromosomes5.Daughter cell is diploid in condition6.This is equal division, because the chromosomal number multiplies 7.No crossing over in chromosomes8.There is no chance of variations

Meosis:1.Occurs only in reproductive cells2.parent cell divides twice 3.Four daughter cells are formed4.Daughter cell is haploid in condition5.This is reduction division, because the chromosomal number reduces6.Crossing over occurs in chromosomes7.Variations occur

1.Mitosisgives two nuclei,while meiosis gives four.2.Mitosis consists of one stage whereas meiosis consists of two stages. 3.Chromatids are long and thin in mitosis, Chromatids are shorter and thick in meosis. 4.Mitosis gives nuclei with the same number of chromosomes as the mother cell while meiosis gives cells with half the number.

mistosis me one stage hota hai aut meiosis me Four stage hota hai

please except in best and also like it

please except my answer in the best answer and also like it.thanks



Discussion

No Comment Found