TY - CHAP M1 - Book, Section TI - Genetics A1 - Cunningham, F. Gary A1 - Leveno, Kenneth J. A1 - Dashe, Jodi S. A1 - Hoffman, Barbara L. A1 - Spong, Catherine Y. A1 - Casey, Brian M. PY - 2022 T2 - Williams Obstetrics, 26e AB - Genetics is the study of genes, heredity, and the variation of inherited characteristics. Medical genetics addresses the etiology and pathogenesis of human diseases that are at least partially genetic in origin, as well as their prediction and prevention. Whereas a gene is a specific sequence of deoxyribonucleic acid (DNA) on a single chromosome that codes for a particular protein, a genome is the entirety of all genes that make up an organism. Genomics is the study of how genes function and interact with one other. Chromosomal, mendelian, and nonmendelian genetic conditions are reviewed in this chapter. Prenatal and preimplantation genetic testing and newborn genetic screening are discussed in Chapters 17 and 32, respectively. SN - PB - McGraw Hill CY - New York, NY Y2 - 2024/03/29 UR - obgyn.mhmedical.com/content.aspx?aid=1190751569 ER -