J. Craig Venter, who mapped the first draft of the human genome and helped scientists understand how genes shape our lives, died Wednesday. He was 79. Venter’s death was announced by the J. Craig Venter Institute, a genomics research group with locations in La Jolla, California , and Rockville, Maryland . The institute said he died in San Diego after being hospitalized for side effects from a recent cancer treatment. In the 1990s Venter bet that he could use a different sequencing technique to speed up the process of decoding the human genome and beat an enormous government effort called the Human Genome Project. And in 2000, Venter’s private company Celera Genomics announced, along with Human Genome Project leaders, that they had decoded the 3.1 billion sub-units of DNA , the chemical “letters″ that make up the recipe of human life. Three years later, in April 2003, the project declared the genome complete.…