It is said that a DNA is never the same for two people. How is  then a father of a child, determined  by a DNA
492162
its true that no two person can have the same DNA...\n\nbut the determination of parental disputes is not done by matching the DNA but by matching the small sequences present on the DNA known as Genes...\n\na collection of a set of genes on DNA is called chromosome..\n\nsince a child has 50% characteristics of both the father and the mother, he has the same set up of genes in his/her chromosomes.. on the chromosomes, there are many sites which are exclusive to that set of gene and chromosome and are known as VNTR's VARIABLE NUMBER TANDEM REPEATS...\n\nthese sites are very unique, they differ from person to person but remain in the same place in a lineage.... this very property of the genes on the chromosome containing DNA accounts for the determination of parental disputes..\n\n\nfor eg:   suppose in gene A, of Chromosome 1 ur mom has 5 VNTR alternatively and ur dad had 3...\n\nso if u a guy then u'll have the same 3 VNTR's on the gene containing chromosome..\n\nas simple as that..\n\nhope u got the point...
1122259
The chemical structure of everyone's DNA is the same. The only difference between people (or any animal) is the order of the base pairs. There are so many millions of base pairs in each person's DNA that every person has a different sequence. \nUsing these sequences, every person could be identified solely by the sequence of their base pairs. However, because there are so many millions of base pairs, the task would be very time-consuming. Instead, scientists are able to use a shorter method, because of repeating patterns in DNA. \nThese patterns do not, however, give an individual "fingerprint," but they are able to determine whether two DNA samples are from the same person, related people, or non-related people. Scientists use a small number of sequences of DNA that are known to vary among individuals a great deal, and analyze those to get a certain probability of a match.
941509
Cloning has given us the technology to take a nucleus out of one cell and place it in another cell.  It is now possible, for example, to take the nucleus out of a defective sperm (one that will not swim) and place it in a sperm that does, or to take a nucleus out of a defective egg (one that does not allow the sperm to penetrate) and place it in a good egg.  Then you could allow fertilization to happen in vitro and the resulting zygote would not be a clone of either parent; it would have half the DNA from mom and half from dad just like any normal baby.  \nMany times when they talk about human cloning they are not just talking about cloning a human organism; they are talking about cloning human cells.
1135308
Last I heard.  babies DNA came form the parents, not God.  hellloooooo?
1185407
Here's the honest answer - We probably don't know exactly why, but even though each child will inherit 50% of its DNA from each parent, it's possible for them to inherit somewhat different amounts of DNA from each grandparent, thanks to the "Law of Independent Assortment".  Even more unlikely, you might have two fraternal siblings inheriting roughly similar DNA from each parent.  Statistically, that's a real longshot because crossing over tends to balance out the Law od Independent Assortment. Probably, they only look like twins, possessing simliar dominant chracteristics.  If you tested them for DNA matching, they'd probably test the same as any other pair of non-identical siblings 1/4.
760896
If the DNA samples applied to the autoradiogram come from both parents and the child, try comparing the distance traveled child's DNA fragments to that of both the mother and father.  There should be commonality to some degree if there is a relationship.  The more markers in common, the more likely the sire.
815639
DNA is in chromosomes. Chromosomes are in 23 pairs: 2 *different* copies of Chromosome 1, 2 different copies of C2, etc, in each person.  Whether you get your father's Chromosome 1 that he got from his mother, or the one he got from his father, is random with respect to which Chromosome 2 you get from your father. Same goes for your siblings. The chances of two nontwin siblings getting the same exact set of 23 5chromosomes from one parent are vanishingly small. The chances of siblings getting the same exact set of 23 chromosomes from EACH parent are .. well, it's essentially impossible. \n\nSame goes for the possibility that they would receive NO chromosomes in common - although it is theoretically possible to have siblings that share no genetic relation at all.\n\nDNA evidence is never 100% conclusive, but the tests that are widely used (if done properly) have such a small possibility of being wrong that they might as well be 100% conclusive. That's because there's just so much genetic material in any one person, it averages out ... makes it so that siblings are actually very close to 50% alike - even though they could be anywhere from 0 to 0% alike, in theory.
913841
Because DNA is identical, and it is the unique genetic code from which we each emerge. With twins - DNA is the same, as are the chromosomes, but the proteins, cells and organs which are transcribed/expressed from that DNA may vary slightly.
534422
No possible way of knowing that since nobody (I am quite sure) has gone back and tried to determine whether the particular DNA evidence used in all those cases was "accurate" or "inaccurate."  In general, however, it is my belief that when performed properly and correctly used, DNA evidence is virtually infallible.
577209
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.\n\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.\n\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.\n\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\nContrary to a common misconception, the DNA is not a single molecule, but rather a pair of molecules joined by hydrogen bonds: it is organized as two complementary strands, head-to-toe, with the hydrogen bonds between them.[1] Each strand of DNA is a chain of chemical "building blocks", called nucleotides, of which there are four types: adenine (abbreviated A), cytosine (C), guanine (G) and thymine (T).[1] (Thymine should not be confused with thiamine, which is vitamin B1.) In some organisms, most notably the PBS1 phage, Uracil (U) replaces T in the organism's DNA.[2] These allowable base components of nucleic acids can be polymerized in any order giving the molecules a high degree of uniqueness.\n\nBetween the two strands, each base can only "pair up" with one single predetermined other base: A+T, T+A, C+G and G+C are the only possible combinations; that is, an "A" on one strand of double-stranded DNA will "mate" properly only with a "T" on the other, complementary strand; therefore, naming the bases on the conventionally chosen side of the strand is enough to describe the entire double-strand sequence.[1] Two nucleotides paired together are called a base pair. On rare occasions, wrong pairing can happen, when thymine goes into its enol form or cytosine goes into its imino form. The double-stranded structure of DNA provides a simple mechanism for DNA replication: the DNA double strand is first "unzipped" down the middle, and the "other half" of each new single strand is recreated by exposing each half to a mixture of the four bases. An enzyme makes a new strand by finding the correct base in the mixture and pairing it with the original strand. In this way, the base on the old strand dictates which base will be on the new strand, and the cell ends up with an extra copy of its DNA.\n\nDNA contains the genetic information that is inherited by the offspring of an organism; this information is determined by the sequence of base pairs along its length. A strand of DNA contains genes, areas that regulate genes, and areas that either have no function, or a function yet unknown. Genes can be loosely viewed as the organism's "cookbook" or "blueprint".\n\n\n\nCloning is the process of creating an identical copy of an original. A clone in the biological sen
1092824
A person who is a chimera is made up of cells from different people. So some of their cells have the DNA of one person and the other cells have the DNA of another person. How do you do that? \n\nImagine that inside of a womb, instead of there being only one egg, there are actually two. If both of these eggs get fertilized by two different sperm cells, you get fraternal twins. Fraternal twins are no more related than any brother or sister. \n\nNow, imagine that instead of developing separately, these fertilized eggs actually fuse. Then only one baby would develop. This baby would have cells from not one, but two different zygotes. \n\nevery zygote carries its own unique set of DNA. So the baby would have two different sets of DNA. Most chimeras grow up and look like everyone else. You probably wouldn’t be able to tell that the person was a chimera. Sometimes you can see patchy areas on the skin or two different colored eyes.
1154963
"DNA" testing is not sequence testing.  DNA is made up of nucleic acids (A, C, G, T).  In typical testing, the sample (blood, saliva, hair, skin) is treated so that the DNA material within the cells are extracted.  However, to actually sequence it against a known sample would take ages (i.e. the human genome project).  What forensics testing does is actually subject DNA material to enzymes that make specific cuts in the DNA strands that result in "characteristic" fragments or pieces in the DNA (in regions with high inter-individual variability).  So when these fragments are identified, it is matched against others who may or may not have the same fragment patterns (i.e. 1 out of 20,000 people will have an identical pattern).
705792
a child is created in his/her parents image, a gene from each  shapes the child, they decide the action that starts the creation, but yet a child  for the most part, is not equal to the parent,,,,\n\nand please dont classify all believers or even all believers in Jesus, into one group lol  i do both, yet are not christian
851889
It can be linked to a specific person because of the DNA \nin it.
638300
The answer is D because dad is hemizygous dominant and mom is heterozygous since both are normal. The kid got the Xt from mom and Y from dad. The kid couldn't get the bad gene from dad because if dad had it to give, then dad wouldn't be normal.
577414
sooo, i only share 50% of my DNA with my dad, whom i actually look like; and you want to tell me that this ape has more in common with me than my dad: whose genes i actually have?  your logic is screwed up.
1021072
it can happen -- can affect the development of the baby. well, your friend was lucky with this one. usually when a child is conceived incestuously, they are a little on the "slow" side when it comes to brain development. i've heard a lecture about this before, kinda forgot about it though. i think it's because if the mother and father shared the exact same DNA pattern -- it's TOO compatible -- and it has a negative effect. a little variety does not hurt -- that's why we always find mates outside the family. \n\nabout passing the genetics with his children -- ofcourse im guessing that the wife is not his biological sister, is she? if not, then i would think there is about a 75% chance that they would be conceived normally. and also, if there were not genetic problem found in him, then more likely it would not be passed on to his children. (hopefully) it's still possible though, but very little chance