what is the diference between simple, multiple and binary fission? (biology)?
411320
simple is when there is a simple fission, multiple is when there are multiple fissions and binary is when there is just one fission heh...
1094752
Identical twins come from a single egg which split in two. Fraternal twins come when there were two eggs.
910568
During prophase. But it actually doesn't happen in all organisms. Yeast for example has a nuclear duplication and division without ever breaking down the nuclear membrane.
973826
Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced. Meiosis involves a reduction in the amount of genetic material.\n\nMeiosis comprises two successive nuclear divisions with only one round of DNA replication.\nFour stages can be described for each nuclear division.
352493
Twins are of two types 1) Fraternal 2) Zygotic.\n \n1) The fraternal twins develop from two different eggs that are fertilized at one and the same time.\n In this case DNA strands may not be identical. Mostly they are not.\n\n2) Zygotic, Identical or Siamese twins develop from only one fertilized egg. It splits early in to two and both the halves develop in to full-fledged individuals. Only in such cases the DNA is IDENTICAL.The sex is also the same.\n  Where as in fraternal twins the sex also be different , one boy and the other girl. It is like two siblings born together.
543572
Its the primary structure...\nSecondary refers to the arrangement of protein residues in realtion to one another. alpha helix beta strand etc...\nTertiary is the big picture-what these things actaully look like. Quaternary structure is the comming together of of the teriary subunits.
952081
1. Usually all living cells of the same organism have the same exact DNA. But the cell type determines which genes are actually expressed.\n\n2. Eukaryote are more complex cells and have a longer time between transcription and a a functional protein. They use repression, signal cascades, phosphorylation, etc. A prokaryote has simpler regulation because transcription itself is usually the regulation.\n\n3. Vertebrates have 4 groups of hox genes, fruit flies only have one group. Look at the way the hox genes are expressed in development and what specifically they do (Sorry I can't give a more direct answer, I don't remember enough of my animal biology.)\n\n4. Polyploidy generally makes plants bigger, this makes their fruit bigger also. Another advantage is manipulation of fertilization. For example: seedless watermelon is produced by crossing a diploid with a tetraploid to get an infertile triploid. The embryos abort in the triploid and fail to form mature seeds.
888620
Nuclear fission—also known as atomic fission—is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products, and usually some by-product particles. Hence, fission is a form of elemental transmutation. The by-products include free neutrons, photons usually in the form gamma rays, and other nuclear fragments such as beta particles and alpha particles. Fission of heavy elements is an exothermic reaction and can release substantial amounts of useful energy both as gamma rays and as kinetic energy of the fragments (heating the bulk material where fission takes place).\n\nNuclear fission produces energy for nuclear power and to drive explosion of nuclear weapons. Fission is useful as a power source because some materials, called nuclear fuels, both generate neutrons as part of the fission process and also undergo triggered fission when impacted by a free neutron. Nuclear fuels can be part of a self-sustaining chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.\n\nThe amount of free energy contained in nuclear fuel is millions of times the amount of free energy contained in a similar mass of chemical fuel such as gasoline, making nuclear fission a very tempting source of energy; however, the waste products of nuclear fission are highly radioactive and remain so for millennia, giving rise to a nuclear waste problem. Concerns over nuclear waste accumulation and over the immense destructive potential of nuclear weapons counterbalance the desirable qualities of fission as an energy source, and give rise to intense ongoing political debate over nuclear power.\n\nhere:http://en.wikipedia.org/wiki/Nuclear_fission#Physical_overview
247051
Fission. The process by which a parent cell (including the nucleus) divides into two smaller copies of itself.
728867
In biology, meiosis is the process that allows one diploid cell to divide in a special way to generate haploid cells in eukaryotes. The word "meiosis" comes from the Greek meioun, meaning "to make smaller," since it results in a reduction in chromosome number.\n\nMeiosis is essential for sexual reproduction. It therefore occurs in most eukaryotes, including single-celled organisms. A few eukaryotes, notably the Bdelloid rotifers, have lost the ability to carry out meiosis and acquired the ability to reproduce by parthenogenesis. Meiosis does not occur in archaea or prokaryotes, which reproduce by asexual cell division processes.\n\nDuring meiosis, the genome of a diploid germ cell, which is composed of long segments of DNA called chromosomes, undergoes DNA replication followed by two rounds of division, resulting in haploid cells called gametes. Each gamete contains one complete set of chromosomes, or half of the genetic content of the original cell. These resultant haploid cells can fuse with other haploid cells of the opposite gender or mating type during fertilization to create a new diploid cell, or zygote. Thus, the division mechanism of meiosis is a reciprocal process to the joining of two genomes that occurs at fertilization. Because the chromosomes of each parent undergo genetic recombination during meiosis, each gamete, and thus each zygote, will have a unique genetic blueprint encoded in its DNA. In other words, meiosis is the process that produces genetic variation.\n\nBiochemically, meiosis uses some of the same mechanisms employed during mitosis to accomplish the redistribution of chromosomes. There are several features unique to meiosis, most importantly the pairing and recombination between homologous chromosomes, which enable them to separate from each other.click here:http://en.wikipedia.org/wiki/Meiosis#History\n\nMitosis is the process by which a cell separates its duplicated genome into two identical halves. It is generally followed immediately by cytokinesis which divides the cytoplasm and cell membrane. This results in two identical daughter cells with a roughly equal distribution of organelles and other cellular components. Mitosis and cytokinesis together is defined as the mitotic (M) phase of the cell cycle, the division of the mother cell into two daughter cells, each the genetic equivalent of the parent cell.\n\nMitosis occurs exclusively in eukaryotic cells. In multicellular organisms, the somatic cells undergo mitosis, while germ cells — cells destined to become sperm in males or ova in females — divide by a related process called meiosis. Prokaryotic cells, which lack a nucleus, divide by a process called binary fission.\n\nBecause cytokinesis usually occurs in conjunction with mitosis, "mitosis" is often used interchangeably with "mitotic phase". However, there are many cells where mitosis and cytokinesis occur separately, forming single cells with multiple nuclei. This occurs most notably among the fungi and slime moulds, but is found in various different groups. Even in animals, cytokinesis and mitosis may occur independently, for instance during certain stages of fruit fly embryonic development.\n\nTranscription is generally believed to cease during mitosis, but epigenetic mechanisms such as bookmarking function during this stage of the cell cycle to ensure that the "memory" of which genes were active prior to entry into mitosis are transmitted to the daughter cells.click here:http://en.wikipedia.org/wiki/Mitosis#Overview
383382
Eukaryotic cell division is called mitosis while prokaryotic is known as binary fission (cell divides in half - forming two daughter cells which are genetically identical)\nE- Sex cells in diploid(two copies of chromosome) therefore organisms are produced through meiosis \nP- Organisms are haploid (one single copy of chromosome), No meiosis needed
604097
actually there are more than 2 types....\n and I'm not kidding..\n but if you want 2....\n i would go with compound and simple...there are some how intersting to read about.
136236
Hi there, \n\nMany types of bacteria undergo cell division by a procedure called 'Binary Fission'\nYeast does not undergo cell division, however, it reproduces through 'Budding'\n\nHope this helps. If not, I'd be glad to assist you further. Bye!!\n\nrule wid style n luv@vinny
65880
Meiosis: -- One cell becomes 4 cells--There are 4 new "daughter" cells. Each new gamete cell contains only one-half of the number of chromosomes of the parent cell. Each sex cell goes through the division process twice in order to have the correct number of cells, and the correct chromosomal information.\n\nMitosis: -- One cell becomes two cells-- The new "daughter" cell has exactly the same number of chromosomes and information as the "parent" cell. 1 cell divides and becomes 2 cells.
486567
Cell cleavage is multiplication of cells by fission. \n\nMitosis is the process in cell division by which the nucleus divides, typically consisting of four stages, prophase, metaphase, anaphase, and telophase, and normally resulting in two new nuclei, each of which contains a complete copy of the parental chromosomes. It is also called karyokinesis. :)
457393
mitosis is the process of nuclear division in which the chromosomes replicate and become equally distributed into two daughter so that they hane the same number and type of chromosomes as present in the parent. it was first observed by Strasburger(1870) in plants and by Boveri & Fleming(1879) in animal cells... its also known as somatic division as it involves only the somatic body cells, also since its keeps the chromosome numeber the same its also known as equitorial division..\n\n\nmeiosis occurs in diploid cells and gives rise to four haploid nuclei, each havin n/2 number of chromosomes, here n is the number of chromosomes.. in this the nuclei divides twice but the chromosomes are replicated only once....\n\nits divided into 2 stages\n1. Meiosis 1\n2. Meiosis 2\n\neach have a number of sub stages..\n\nthere are 1000's of major differences, i'll sorting them, its upto u to remember the one... and as far as the pneumatic device is considered, it's common 2 all of us..\n\n\n1. Mitosis takes place in somatic cells, whereas Meiosis in reproductive cells.\n\n2. mitosis occurs in both haploid & Diplois, meiosis in diploid only.\n\n3. 2 & 4 daughter cells produced resp..\n\n4. CHROMOSOMES REPLICATE IN THE INTERPHASE BEFORE EVERY DIVISON IN MITOSIS BUT IN MEIOSIS THEY REPLICATE ONLY ONCE PRIOR TO MEIOSIS.
774212
Mitosis is the formation of identical daughter cells, it has nothing to do with the interacting of "two" cells.  Plant cells have a different pinching off process when the one cell becomes two because of the cell walls.  Also animal cells have a structure called centrioles that does something in mitosis but I do NOT remember what it does...