RT Book, Section A1 Cunningham, F. Gary A1 Leveno, Kenneth J. A1 Dashe, Jodi S. A1 Hoffman, Barbara L. A1 Spong, Catherine Y. A1 Casey, Brian M. SR Print(0) ID 1190751569 T1 Genetics T2 Williams Obstetrics, 26e YR 2022 FD 2022 PB McGraw Hill PP New York, NY SN 9781260462739 LK obgyn.mhmedical.com/content.aspx?aid=1190751569 RD 2024/03/29 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.