


Genetics, DNA, and Heredity
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. … Every person has two copies of each gene, one inherited from each parent. Most genes are the same in all people, but a small number of genes (less than 1 percent of the...
The New Genetics
The New Genetics is a science education booklet that explains the role of genes in health and disease, the basics of DNA and its molecular cousin RNA, and new directions in genetic research.