TY - CHAP M1 - Book, Section TI - Chapter 11. Epidemiologic Studies of Genetics A1 - Greenberg, Raymond S. A1 - Daniels, Stephen R. A1 - Flanders, W. Dana A1 - Eley, John William A1 - Boring, John R. PY - 2005 T2 - Medical Epidemiology, 4e AB - Familial aggregation of a disease is suggested when the recurrence risk among relatives of affected persons exceeds that among relatives of unaffected persons. In studies of twins, greater concordance for disease among monozygotic twins as compared with dizygotic twins suggests genetically determined susceptibility. If subjects with a high degree of inbreeding have an elevated risk of disease, an autosomal recessive pattern of inheritance may be suggested. Co-segregation refers to the tendency of alleles that are situated closely together on the chromosomes to be inherited together. Linkage of a marker gene (with a known location in the genome) and a disease susceptibility gene can suggest the particular chromosome involved and where on the chromosome the susceptibility gene is likely to be located. Segregation analysis of pedigrees is a complex statistical technique used to determine whether a disease has, at least in part, a genetic origin, and if so, the likely pattern of inheritance. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/04/16 UR - accesspharmacy.mhmedical.com/content.aspx?aid=546260 ER -