Scientists say they have finally assembled the full genetic blueprint for human life, adding the missing pieces to a puzzle nearly completed two decades ago.
The human genome is made up of about 3.1 billion DNA subunits, pairs of chemical bases known by the letters A, C, G and T. Genes are strings of these lettered pairs that contain instructions for making proteins, the building blocks of life. Humans have about 30,000 genes, organized in 23 groups called chromosomes that are found in the nucleus of every cell.
Their work adds new genetic information to the human genome, corrects previous errors and reveals long stretches of DNA known to play important roles in both evolution and disease. A version of the researchwas published last year before being reviewed by scientific peers. Turns out that gold includes many important genes, he said, such as ones integral to making a person's brain bigger than a chimp's, with more neurons and connections.Reading genes requires cutting the strands of DNA into pieces hundreds to thousands of letters long. Sequencing machines read the letters in each piece and scientists try to put the pieces in the right order. That's especially tough in areas where letters repeat.
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Scientists finally finish decoding entire human genomeScientists say they have finally assembled the full genetic blueprint for human life, adding the missing pieces to a puzzle nearly completed two decades ago.
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