One study compares phenotypic characteristics to genotypic characteristics. Substantial phenotypic and genotypic evidence exists to demonstrate heterogeneity within the species. HCMV antiviral drug resistance can be detected by phenotypic or by genotypic drug resistance testing. Retinitis is a genotypic disease which entails severe phenotypic representation. Annuality and perenniality are complex traits involving many underlying, often quantitative, genotypic and phenotypic factors. A substantial part of the phenotypic variation in a population is caused by genotypic variation. Candida has plenty of phenotypic and genotypic plasticity which means it generates change quickly. Worker food preferences have been connected to genotypic variation at specific quantitative trait loci. In that way, compartmentalization allows for selection for genotypic mutations. These SeV variants develop certain genotypic changes. There are two major approaches to defining and partitioning "genotypic variance". The balancing of evolutionary costs and benefits have shaped the distribution of these genotypic traits. There were four distinct genotypic clusters found in this collection of Apios lines. Added demands are made on the soma by sequential genotypic modifications is the fourth position. Genotypic and chemotypic variations were closely associated.