DNA

Whether you have blue eyes or brown, lactose tolerance or intolerance, curly hair or straight, the roots of these traits [blank] in your DNA. Deoxyribonucleic Acid DNA is the hereditary material in humans and almost all other organisms, containing the biological instructions that make each species unique. DNA, first identified in the late 19th century and [blank] structure as a double helix was discovered in 1953 by Watson and Crick, is present in the nucleus of every cell in an organism. It's estimated that if unwound and linked [blank] , the strands of DNA in one cell would stretch almost 6 feet in length. For many years, the complexity of DNA made understanding the full extent of its influence a distant dream. However, with the [blank] of advanced genomic technologies, scientists have made groundbreaking strides in understanding and mapping the human genome.