This dna and genetics scientific discoveries documentary highlights the influence dna and genetics have on cells. discoveries of the 21st century are also spoken of as well as answering the question what is dna and genes? Genetics is the study of genes, genetic variation, and heredity in living organisms. It is generally considered a field of biology, but intersects frequently with many other life sciences and is strongly linked with the study of information systems. A gene is made of DNA (deoxyribonucleic acid) and is basically a type of genetic instruction. Those instructions can be used for making molecules and controlling the chemical reaction of life. Genes can also be passed from parent to offspring; this is inheritance.