DNA !! 1 paragraph on each person and what there part was !?
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The following wikipedia link talks about the DNA model watson and crick proposed. \n\nYou will also find that each of the scientists you listed above is mentioned in the article, and hyperlinks will take you to webpages with short biographies on their lives and their work.\n\n\nhttp://en.wikipedia.org/wiki/DNA#Watson_and_Crick.27s_model
714003
Look in this website:\n\nhttp://www.ba-education.demon.co.uk/for/science/dnamain.html\n\nunder the section:\nThe people responsible for the discovery of DNA\n\nand this website:\n\nhttp://nobelprize.org/educational_games/medicine/dna_double_helix/readmore.html
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you can read up on it here\n\nhttp://en.wikipedia.org/wiki/DNA\n\nbut even better would be to buy related books and take related courses
183355
Chromosomal DNA is what determines who we are as individuals.  There are 23 pairs of choromosomes.  There are 22 pairs of autosomes which are alike in male and females and then thereis one pair of sex chromosomes.  XX is female.  XY is male.
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(Click to enlarge) \nDNA \ndouble-helix DNA model\nA. adenine\nT. thymine\nC. cytosine\nG. guanine\nD. deoxyribose\nP. phosphate\n(Academy Artworks) \nDNA (dē'ĕn-ā') \nn.\nA nucleic acid that carries the genetic information in the cell and is capable of self-replication and synthesis of RNA. DNA consists of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine. The sequence of nucleotides determines individual hereditary characteristics.
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C - T - G - A\n\nIN DNA\nC matches with G\nA matches with T\n\nIn RNA\nC matches with G\nA maches with U
851956
First, kudos to you for being so open minded.\n\nI haven't read the Nat'l Geo article yet ... but I have it, and am anxious to read it.  Say what you will, the photos are breathtaking (but that's nothing new with Nat'l Geo).  And I have read several Dawkins books, but not that one. \n\nBut without hearing your specific counter-arguments, I don't know how to address them, or why you find the evidence to be "not of such high quality."  The evidence is actually *exceedingly* strong ... and most scientists accept it.\n\nI highly recommend two books in the "Beginners" series.  Specifically, "DNA for Beginners" and "Darwin for Beginners".   Don't be fooled by the cartoon format of these books ... they are excellent introductions to the science.\n\nBut if I can try and guess your point ... if the evidence of genetic linkage with *prehistoric* species is not of "high quality", it's because the DNA molecule (the source of all genetic material for all life on this planet) breaks down rather quickly.  Even a few hundred years is enough to start breaking down the DNA in the remains of animals.  And fossils rarely contain any genetic material.  However, this is not always true.  Occasionally, bone tissue can remain in fossils, and some DNA can be extracted (as we have done with Neanderthal, for example).  But overall, recovering genetic material from prehistoric animals is difficult.\n\nHowever, the genetic links can be reconstructed quite well by examining genetic similarities between living descendants of that prehistoric species.  If living species A, B, and C all have specific genes in common (code for the same protein, same location in the chromosomes, almost identical amino-acid structure), then this tells us that their common ancestor X had these genes.  If there is a fouth species D that has some, but not all the genes shared by A, B, and C ... then this indicates that there is a common ancestor Y that is further back that is the ancestor of all four living species.\n\nFuthermore, there is the concept of the 'molecular clock'.  This is the known rate at which transcription errors (basically 'typos') occur in DNA as it gets passed from generation to generation.  So the number of minor 'typos' found in the DNA of A, B, and C gives us a strong indication of how long ago their common ancestor X lived.  (For more info. see source.)\n\nI hope that helps.  It's hard to be more specific without knowing what your specific objections are.
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new DNA...i dont know in new DNA but normal DNA is composed of sequences of Nucleotides which are molecules of sugar, Phosphate and a Nitric substance... sequences of predetermined Nucletides make genes...Humans have 46 chromosomes so we have 46 DNA Molecules....\n\nThis si complicated i could talk about 3 hours of DNA...why do u want to know that...this is advanced Molecular biology
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DNA - deoxyribonucleic acid \nRNA - ribonucleic acid
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Wow:  Thanks for the info about the DNA.  For those readers that wondered how the world comes into being without God creating what He alone is able and willing, such info as the DNA, let alone the rest of the whole complex of Created mass and masterpieces, it rests on this issue.  You see, you think, and you understand.  OR you see, and refuse to see, you think and you refuse to think, and you refuse to understand.  Part of that matter of Free choice.  The simple fact is, what you choose to believe is also part of the gift you were given in Creation.  You believe or not, and amazing, it gives you a part in the rest of the community.  There are adequate numbers of unbelievers, that will all affirm your faithlessness, just as there are adequate numbers of believers who will affirm your believe in pagan cult, just as there are adequate numbers of believers in Islam, or Christianity or any other form religion.  Numbers however, doesnt affirm factuallity.  Flat world theorists believe it.  Round world hanging in space believe it.  Sun circling the earth believers affirm it, as do earth circling the sun believers affirm their bit of observation.  \n   Did Noach go searching for the animals?  No, the Text says, according to Moses, affirming that GOd instructed him to write, that God caused the animals to come to the ark.  Noachs job was to build it and stock it with grain and grass, as all the animals would eat vegetarian while aboard, including Noach and family.  Is that possible?  Depends on how you view and believe.  Impossible for those who refuse to believe that GOD was involved.  Possible for those that choose to believe in such miracle process or natural process.   It is all amazing, no matter what you believe.  If you believe God created, thats amazing.  From my point of view thats acceptable.  What would be more amazing is to try to figure out how all this world in all its complexity came into being without a Creator God, since it is obviously more complex than any human can contrive.  Heck,,,we cant even create a blade of grass from nothing, let alone a human eye..or the rest of a human being.\n   The story of the group of scientists who were all working on a grand assignment, to duplicate life...and one day they all agreed, they had done it.  Accomplished the grand impossible,  they had developed a life form in a petri dish.   Eureka they shouted...we did it.  We dont need GOD any more.   THEN GOD SAID :  Now, try it without anything:  No dirt, no fire, no water, no air and no petri dish.
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All living beings on Earth have DNA
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withont dna on their daughter who knows
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According to the watson and crick model the DNA\nStucture is built like a spiral staircase .\nFr the rest of it try th link below.
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the difference in DNA between humans is SUPER tiny, like in the hundreths of a percent different.  humans are approximately .001% different
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This would obviously be very approximate.\n\nEach cell contains about 6 feet of DNA.\n\nThe average human body contains between 50,000,000,000,000 and 75,000,000,000,000 cells.\n\nSo, thats between 300,000,000,000,000 feet and 450,000,000,000,000 feet of DNA.\n\nSo in miles that would be between 56,818,181,818 miles and 85,227,272,727 miles.\n\nReferences:\n6 feet of DNA in each cell:\nhttp://www.life.uiuc.edu/hughes/footlocker/Activities/Cheek_DNA.pdf\n\nCells in the human body:\nhttp://science.enotes.com/science-fact-finder/human-body/how-many-cells-human-body\n\nFeet to Miles Conversion:\nhttp://www.onlineconversion.com/length_common.htm
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Well, at least you don’t want to know a lot! We have split your questions into four separate parts (look for the other questions in our archived list). The first question will be answered here. \n\nWho discovered DNA? \n\nThis is a tough question because it is hard to know what people mean by DNA. Do they mean genes, or the substance DNA or chromosomes or the structure of DNA or… \n\nHere is a brief timeline of some discoveries about DNA: \n\n1856-1865 Gregor Mendel founds genetics. \n\n1869 Johann Friedrich Miescher discovers a weakly acidic substance in human nuclei he calls nuclein. It is later \ncalled DNA. \n\n1882 Walther Fleming discovers chromosomes. \n\n1902-1903 Walter Stanborough Sutton uses grasshoppers to discover that chromosomes have genes. \n\n1924 Chromosomes are shown to be made of protein and DNA. \n\n1928 Franklin Griffith figures out that genetic information can be transferred from heat-killed bacteria to live ones. \n\n1944 Oswald Avery figures out that Griffith’s substance was DNA. \n\n1949 Edwin Chargaff figures out that no matter the species, the amount of adenine (A) equals the amount of thymine (T) and the amount of guanine (G) equals the amount of cytosine (C). \n\n1953 Francis Crick, James Watson and Rosalind Franklin discover the double helix structure of DNA. \n\n1961 Francis Crick and Sidney Bremmer figure out that three bases (a codon) are needed to code for an amino acid \n\n\nSMILE
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Deoxyribonucleic acid (DNA) is a nucleic acid —usually in the form of a double helix— that contains the genetic instructions specifying the biological development of all cellular forms of life, and most viruses. DNA is a long polymer of nucleotides (a polynucleotide) and encodes the sequence of the amino acid residues in proteins using the genetic code, a triplet code of nucleotides.\nIn complex eukaryotic cells such as those from plants, animals, fungi and protists, most of the DNA is located in the cell nucleus. By contrast, in simpler cells called prokaryotes, including the eubacteria and archaea, DNA is not separated from the cytoplasm by a nuclear envelope. The cellular organelles known as chloroplasts and mitochondria also carry DNA.\nDNA is often referred to as the molecule of heredity as it is responsible for the genetic propagation of most inherited traits. In humans, these traits can range from hair colour to disease susceptibility. During cell division, DNA is replicated and can be transmitted to offspring during reproduction. Lineage studies can be done based on the facts that the mitochondrial DNA only comes from the mother, and the male Y chromosome only comes from the father.\nEvery person's DNA, their genome, is inherited from both parents. The mother's mitochondrial DNA together with twenty-three chromosomes from each parent combine to form the genome of a zygote, the fertilized egg. As a result, with certain exceptions such as red blood cells, most human cells contain 23 pairs of chromosomes, together with mitochondrial DNA inherited from the mother.\n\nMolecular structure:\nAlthough sometimes called "the molecule of heredity", DNA macromolecules as people typically think of them are not single molecules. Rather, they are pairs of molecules, which entwine like vines to form a double helix (see the illustration at the right).\nEach vine-like molecule is a strand of DNA: a chemically linked chain of nucleotides, each of which consists of a sugar (deoxyribose), a phosphate and one of five kinds of nucleobases ("bases"). Because DNA strands are composed of these nucleotide subunits, they are polymers.\nThe diversity of the bases means that there are five kinds of nucleotides, which are commonly referred to by the identity of their bases. These are adenine (A), thymine (T), uracil (U), cytosine (C), and guanine (G). U is rarely found in DNA except as a result of chemical degradation of C, but in some viruses, notably PBS1 phage DNA, U completely replaces the usual T in its DNA. Similarly, RNA usually contains U in place of T, but in certain RNAs such as transfer RNA, T is always found in some positions. Thus, the only true difference between DNA and RNA is the sugar, 2-deoxyribose in DNA and ribose in RNA.\nIn a DNA double helix, two polynucleotide strands can associate through the hydrophobic effect and pi stacking. Specificity of which strands stay associated is determined by complementary pairing. Each base forms hydrogen bonds readily to only one other, A to T forming two hydrogen bonds and C to G forming three hydrogen bonds. The GC content and length of each DNA molcule dictates the strength of the association; the more complementary bases exist, the stronger and longer-lasting the association characterised by the temperate required to break the hydrogen bonding, its Tm value.\nThe cell's machinery is capable of melting or disassociating a DNA double helix, and using each DNA strand as a template for synthesizing a new strand which is nearly identical to the previous strand. Errors that occur in the synthesis are known as mutations. The process known as PCR (polymerase chain reaction) mimics this process in vitro in a nonliving system.\nBecause pairing causes the nucleotide bases to face the helical axis, the sugar and phosphate groups of the nucleotides run along the outside; the two chains they form are sometimes called the "backbones" of the helix. In fact, it