DNA The string

A DNA-string is the building blocks of life. Every living creature has a DNA code that tells the cells how to build up the body. It contains only four different "codes", called "chromosomes", but it is the order of which they appear that counts. The four chromosomes are called "AT", "TA", "CG" and "GC" - "A" stands for "Adenin", "T" for "Thymin", "C" for "Cytosin" and "G" for "Guanin". As you can see the AT is just a reverse version of the TA and so with the CG and GC, like in the top right corner of the screen.
Manipulation

Still more research-facilities around the world are trying to manipulate with DNA strings to create new kind of species. The scientists have even re-created extinct zebra-like specie called the quagga. By putting several different DNA-strings from various zebra's together, the quagga is again here on earth. One of the last photographs of the quagga was taken in 1864 in London Zoo and in 1985 it walked again on the savannas of Africa.
By cutting in the strings, the scientists can get completely different creatures each time they switch the places of which the codes stands. To do that, an enzyme has to be mixed with the string. An enzyme cuts a bit out of the middle of the string and puts the rest together again, which creates a new row of strings. Of course, an entirely body needs the same number of codes, so when the body finds out that a part of the string is missing, it automatically generates the missing part in the end of the string. This is how a new creature can be created.
Bringing the dinosaurs to life

Because of the scientists not knowing how the dinosaurs' genes were, is it impossible to regenerate a large DNA-molecule. A gene indicated the length of the DNA-string. Therefore is the theory about a mosquito which had taken some bloods from a dinosaur and then got stuck in a piece of resin, which got stiff, leaving the mosquito inside with the dinosaur-blood, wrong. By taking the blood from the mosquito you cannot re-generate the dinosaur because of the missing parts of the genes. It is only a very small amount of the genes that the mosquito can get, not enough to create a complete dinosaur. Of course, the scientists could experiment with the strings, but no one knows what the result would be. It could be possible to try with birds, which are the closest related creatures to the dinosaurs.