Every human being in the world begins his life as en egg, a single cell. Once fertilized, this egg develops into the person. But how does microscopic cell exactly know how this complete individual should develop? The answer is that all the instructions necessary for the organism to develop, survive and reproduce are contained in its DNA. DNA is sometimes referred to us the double helix, because of the way of two long strands of genetic information run side by side in a spiral. The nucleus of almost every human cell contains 23 pairs of chromosomes. Each chromosome contains several 100 or even 1000 genes. Each one of genes in its term consists of 1000 or even 100 000 chemical buildings blocks called the bases. There are only 4 different bases, it’s the sequence which determines the information just like all the information on computer disk or CD-s can ultimately be reduced to the secession of zeros and ones. The human genome, which is the complete genetic map of the human being includes 25 000 different genes. These genes are by no means unique for humans. Chimpanzees and human share around 98% of their genes. And even 50% of the genetic code of bananas is common. It means that we are half bananas. All your DNA is inherited from your father and mother. But some parts of it are rearranged, that makes you genetically unique, unless you have an identical twin. That’s why you have points of similarity with your siblings, but it also different from them. It’s also possible to inherit some physical and mental traits from your grandparents or more distant ancestors. Since the recessive genes can be handed down through generations and only take effect when 2 are inherited^ one from each parent. That’s why parents with brown eyes can produce a child with blue eyes.
A DISCUSSION ABOUT GENETIC ENGINEERING
In April 2001 the first genetically monkey was born. Andi developed from an egg into which scientists had inserted a jellyfish gene;...