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    DISEASE ARE CAUSED By bacteria and viruses .Diseases like AIDS and common cold , are caused by viruses,others by bacteria .Normally our immune system protect us against diseases.But sometimes our body -because of stress, or restlessness, become so weak that the immune system does not work properly and we succumb to disease .But we can protect us by vaccination or by medication .In common cold ,the disease causing germs reach the respiratory tract,and mu DISEASE ARE CAUSED By bacteria and viruses .Diseases like AIDS and common cold , are caused by viruses,others by bacteria .Normally our immune system protect us against diseases.But sometimes our body -because of stress, or restlessness, become so weak that the immune system does not work properly and we succumb to disease .But we can protect us by vaccination or by medication .In common cold ,the disease causing...

  Genes are segments of DNA located on chromosomes that contain the instructions for protein production. Scientists estimate that humans have as many as 25,000 genes. Genes exist in more than one form. These alternative forms are called alleles and there are typically two alleles for a given trait. Alleles determine distinct traits that can be passed on from parents to offspring. The process by which genes are transmitted was discovered by Gregor Mendel and formulated in what is known as Mendel's law of segregation. Gene Transcription Genes contain the genetic codes, or sequences of nucleotide bases in nucleic acids, for the production of specific proteins. The information contained within DNA is not directly converted to proteins, but must first be transcribed in a process called DNA transcription. This process takes place within the nucleus of our cells. Actual protein production takes place in the cytoplasm of our cells through a process called trans...