Foreign pieces of DNA strands of diferrent lenghts be separated out???
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C)gel electrophoresis. \nIn gene splicing ther's cutting of DNA At specific regions. DNA Cloning involves the magnification or production of identical copies of DNA
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DNA is a double helix molecule.  The 2 strands are aniparellel (one runs 3' to 5' and the other 5' to 3').  The DNA says in the nucleus of the cell.  The way it replicates is that in uncoils itself and separated from the other strand.  Because of the 4 different nucleotides it is simple to replicate.  The nucleotides are shown as A,C,T, and G.  G goes with C, and T goes with A.  After the stands have separated the nucleotides that are floating about attach themselves to the proper match.  They attach themsleves using an enzyme called DNA polymerase. Now you have 2 complete DNA strands.
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base on theory, yes. but practicaly, the problem is the sample of DNA, there is complete DNA code or not.
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It's Deoxyribonucleic acid.
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Genes that are close together will tend to stay together after a cross-over. The distance between the genes will be roughly proportional to the frequency at which they are separated by cross-overs.
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High-throughput DNA Isolation Protocol \n\nCTAB Method \n\n1.      Add 80 ul 2-mercaptoethanol to 40 ml CTAB buffer (see recipe below) right before use (0.2%) and mix. \n\n2.      Preheat CTAB DNA isolation buffer to 65°C in a water bath. \n\n3.      Grind freeze-dried leaf tissue (~100mg) in a Mixer Mill for 3-5 min at 30 time/sec with one 3mm steel bead in a 1.1 ml  tube strip from Qiagen\n\n4.      Carefully pour beads out of tubes and add 300 ul CTAB buffer into each tube with a multi-channel pipette (if a plate is used, you can leave beads in until the end of work)\n\n5.      Cap the tube strips and label each strip, caps and rack, incubate the samples in 65 °C water bath for 60-80 min, use shipping tape to secure the rack and lid to prevent caps from openning up while inverting the rack to mix samples.\n\n6.      Mix samples every 15 min by inverting rack 5-10 times to make sure plant tissue mixes well with the buffer. Watch for sample leaking from caps. \n\n7.      Take samples out of water bath, briefly spin sample box in a centrifuge for 1 min at 1500 rpm (balance box weight before spinning), separate caps from tube and put the cap strips on clean paper and arrange them in order so that they can be reused. \n\n8.      Add 300 Chl/IAA (25:1) into each tube with a multi-channel pipette, cap tube with original cap strips, put a plastic board between tube cap and rack lid to make sure every strip cap gets the same pressure from the lid, cover the box with lid, secure the lid with shipping tape. Mix the samples by inverting the box slowly for 15 min (Chloroform can create pressure and cause leaks of chloroform, so the tubes have to be tightly capped).\n\n9.      Centrifuge at 5,700 rpm  for 10 min. \n\n10.  Transfer the aqueous phase using a wide-bore pipette tip (about 200ul) into a labeled clean plate (650 ul plate), add 150 ul of cold isopropanol (-20 °C), securely cover the plate with a plate cover (or cap strips) and mix gently by inverting the plate several times to precipitate DNA. \n\n11.  Recover the DNA by centrifuging at 5,700 rpm (6100g) for 10 min. Discard the supernatant immediately by suddenly inverting the plate and dry it briefly on several layers of paper towels by briefly touching the plate on paper towels two to three times on different positions of towel to remove excess liquid. This step should be very quick (a few seconds). Then turn the plate back upright and air-dry samples to remove excess liquid for ~10 min.\n\n12.  Add 500 ul of 70% Ethanol directly to the pellet, cover the plate, and invert it gently several times to wash  for 5 min. \n\n13.  Centrifuge at 5,700 rpm for 8 min, and quickly discard wash buffer as described previously (check DNA pellet in each well to make sure DNA stayed in the bottoms of wells\n\n14.  Air-dry DNA pellet at room temperature for ~20 mins to remove excess liquid.\n\n15.  Re-suspend the DNA pellet in 200 u1 of ddH2O and leave it at 4°C overnight \n\n16.  DNA concentration will be ~100ng /ul and can be determined using either an agarose gel or a spectrophotometer. \n\n \n\n                                                                            CTAB  DNA Isolation Buffer (500 ml) \n\n \n\n2% (w/v) CTAB (sigma)\n 10.0 g\n \n1.4M NaCI\n 40.91 g\n \n20 mM EDTA\n 20 m1 of 0.5 M EDTA \n \n100 mM Tris. HCI (pH 8.0)\n 50 ml of 1.0 M\n \nAdd ddH2O to make a final volume of 500 ml \n \n\n \n\nSDS Method \n\n1.      1-2 young leaves (~100mg) are placed in a labeled 1.1-ml collection tube or in a plate well, freeze-dried, and ground for 3-5 min at 30x/sec to a fine powder using a Mixer Mill and one 3-4mm steel bead in each well. (To isolate DNA from dry seeds, half to 3 seeds are wrapped with a weighing paper, crushed with pliers, placed in a col1ection tube or   in a deep-well plate ).\n\n2.      Preheat extraction buffer to 65°C in a water bath. (If the tissue samples are stored at -20°C, allow them to warm up to room temperature).\n\n3.      Add 0.2% (v/v) ß-mercap
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.....They showed that alternating deoxyribose and phosphate molecules form the twiested uprights of the DNA ladder.  The rungs of the ladder are formed by complementary pairs of nitrogen bases--A always paired with T and G always paired with C. \n\nThis is the site I got it from\nwww.dnaftb.org \n\nI hope it helps!
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its DNA it is a part of a gene which is a thing wich codes for something. it is a double stranded structure. its also called a polynucleotide.
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That DNA of different sizes will migrate through a gel at different speeds.\n\nDNA is charged, so applying an electric current will cause the DNA to migrate down the gel, the smaller the piece, the faster it goes.  So you can separete pieces of different lengths, or estimate the size of your band by comparing to a standard ladder.
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the ploidy no is 2n\nbut the dna amount is double. it changes in the metaphase or late prophase
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...DNA through a process called mitosis.
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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
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no! all bacteria (unicellular organisms) are (made up of) prokariotic cells. which means they have no membrane bound organells (such as the nucleus) dna is therefore not separated from the rest of the cell, but forms a single circular loop, sometimes called bacterial chromosome.  bacteria also have smaller loops of dna in the cytoplasms called plasmids.
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Checkout what is being done with nanotechnology and building structures, Complex structures!, with dna strands!\n\nhttp://www.nature.com/nature/links/040212/040212-1.html\n\nIf it CAN and it can be measured imagine what can be done!\nalmost scary!
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You may need watson - creek structure\nDNA structure
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In 1869 Friedrich Miescher, a Swiss researcher, stained a cell nucleus with bromine I think, and found that something in it would stain.  He extracted this something and determined that It was composed of phosphoric acid, nitrogenated organic bases and sugar.\n\nIn 1943 Oswald Avery, a Canadian researcher found that bacteria would transform when washed, when exposed to protease, but not when exposed to deoxyribonuclease.  This led him to conclude that the something Miescher found was by composition supposed to be called deoxyrybonucleic acid and that this DNA was in fact the basic unit of heredity because doexyribonuclease is an enzyme that eats up DNA.\n\nThat's the evidence.\n\nOut genomes aren't made of RNA because that is a single stranded chain. Nothing wrong with that, but it's less sturdy than DNA, which is double stranded and supercoiled and so on.  It's a matter of what is the better means of storing your genetic information.
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http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Lectures/DNA/dna.htm