This is an example of allelic genetic heterogeneity. Additional studies have explored the spatial heterogeneity of kerogen at small length scales. System instability is a major contributing factor for genetic heterogeneity. Regarding composition, all teams will have an element of homogeneity and heterogeneity. She studies human genetics and is particularly interested in genetic heterogeneity and complex traits. Contact angle hysteresis is a phenomenon that characterizes surface heterogeneity. This method is more associated with tumour heterogeneity than linear expansion. Some use "beta diversity" to refer to any of several indices related to compositional heterogeneity. When this excessive variation occurs, it is called statistical heterogeneity, or just heterogeneity. There are two models used to explain the heterogeneity of tumour cells. Ecologists are attempting to understand the relationship between heterogeneity and maintaining biodiversity in aquatic ecosystems. Their independent variables were economic conditions by square-mile areas, ethnic heterogeneity, and population turnover. It is used primarily as a visual aid for detecting bias or systematic heterogeneity. Research however also challenges the notion that ethnic heterogeneity reduces public goods provision. This may be attributed to tumor heterogeneity.