As physicians, we need to know some definitions in Genetics which are related directly to our practice and guide us to diagnose and treat a lot of genetic disorders. These items include genome, genotype, phenotype, genetic code, gene expression, etc......... Which one of the following choices describes the definition of a phenotype? A- Genetic history of an organism B- DNA structure that determines the expression of a trait C- An observable physical or biochemical trait on an organism D- Physical location of a trait on a DNA molecule Answer
