How do you separate the desired DNA from all others?
409008
A desired sequence is isolated by using restriction enzymes.  They are enzymes that cut DNA at specific nucleotide sequences.  PCR envolves a mixture of lots of stuff, but essentially, you are using a cell called a competent cell to preform a transformation.  The cut DNA is introduced into the cell which acts like a machine to copy that DNA over and over again.  PCR means Polymerase Chain reaction.  Polymerase is the enzyme reponsible for DNA replication.
236904
Certain DNA tests can help track ethnicity.
961312
Well, that is the Holy Grail of biochemistry and we've been dreaming of that ever since Dr. Pauling had me researching metabolic diseases, Lesch-Nyhan syndrome in particular.  The problem has been 1) finding the precise genetic coding of the fouled up part of the DNA and 2) devising a mechanism to clip out that nucleic base and replace it with the correct one (or series of bases).  Precision is, of course, vital or you'll kill the experimental animal (or, ultimately, human patient).
566382
try this \n\nhttp://en.wikipedia.org/wiki/DNA_fingerprinting
1126486
They have to do this because only certain parts of DNA are used to ID people. And so much of DNA is similar they prove identity with statistics. So the likelihood of the DNA being the specific person is 1 in 20000 and that linked with other evidence is often more than enough to prove guilt or whatever. There is a law of probability and when things are put together it is very reliable.\n\nOk I am adding on in response to your question. I have consulted a textbook and think that the test described above is pretty conclusive. The textbook describes running a gel with the DNA fragments on it. They space out and are very obviously different to each other and are compared to the original. (see example of gel here http://gallery.hd.org/_c/natural-science/_more1999/_more05/DNA-genetic-fingerprinting-dark-bands-in-gel-are-almost-unique-for-a-given-individual-tweaked-1-AJHD.jpg.html) . Another thing mentioned in my textbook is taking samples from commnunities to compare blood samples. So one could suggest that they took samples of blood from 20000 people in the neighbourhood and only the one persons blood dna fingerprint matched up.
965097
The stages of DNA isolation include\n    1) homogenization of thymus in a buffered isotonic sucrose-detergent solution\n    2) increasing the osmolarity with saline\n    3) centrifugation to remove cellular debris\n    4) decantation of the supernatant into a clean beaker\n    5) precipitation of the DNA by layering cold ethanol on the top of the supernatant\n    6) spooling of the precipitated DNA\n\nCheck out the website... im sure thats pretty much all you'll need :)\n\nhttp://www.biology.clc.uc.edu/fankhauser/Labs/Genetics/DNA_Isolation/Thymus_DNA.htm
432215
My guess would be dna sequencing.
629727
make a model of DNA with wires and thermocole balls
295841
DNA fingerprinting is a way to identify individuals DNA.  It is what forensic scientists use to figure out whose DNA is found at a crime scene or whatever.  Each person has their own unique "fingerprint" except maybe in the case of identical twins.\n\nDNA or "DNASE" footprinting is different.  It is a technique used by researchers to see where a protein binds a piece of DNA.  The DNA with the protein attatched is isolated, and digested with varying amounts of DNASE (an enzyme that cuts DNA).  You then run the DNA out on a gel and find where the DNASE was not able to cut.  Wherever it was not able to cut is where the protein was bound and on a gel it resembles a "footprint"
341693
The mother and child will have *nearly* identical DNA.  There will be a few mutations because mutations are ubiquitous, but 99.99+% of their DNA will be the same.
736965
This might help a little with the DNA part.
778236
hybridization.com\n\nor just type the keyword and the information you needed wud appear..
1136128
No its impossible. The DNA is completely different, and plus cloning was banned by the Geneva Convention a couple of years ago I believe. But if your like the other groups and you want to try it, have at it. But if you do clone it together, dont tell the press or you might just end up going to prison.
961861
DNA comparison by electrophoresis. I've seen kits available in school divisions for science classes. On a similar note: paper chromatography to check if the composition of ink between samples are same or different.
517119
In real world, mostly you need DNA for assorted tests (excluding science, where you need to extract DNA for thousands of reasons). Two major examples:\n\n1. Human genetic tests - paternity tests, screening for genetic diseases, identification of remains, matching samples from crime scenes and so on. \nIn some of the cases, you can do it without extracting DNA (for example, boil some blood to release DNA), but in working with remains you do need to get DNA from the bones.\n\n2. Species identification: even though it is done mostly by antibodies, you can do DNA tests on e.g. fish to see if protected species are sold on the market (great white shark fins sold on Asian markets were identified by DNA testing).\n\n* To clone an animal, you shouldn't extract DNA. You use a whole nucleus from adult cell, DNA, proteins and all, and transfer it into the egg.\n\nHowever, if you count genetic engineering as a real world application, you can add that too. And genome mapping, and all the rest of scientific applications.
292443
Your genetics..dna..you know..the whole human biology thing..
458508
ofcourse, using any other Body cell. every cell has DNA