A term used to describe different genetic mechanisms that produce the same or similar phenotypes.
What is the difference between mutational heterogeneity and locus heterogeneity?
Allelic heterogeneity refers to instances where mutations in different alleles at the same locus produce the same disease. By contrast, locus heterogeneity describes mutations in different genes whereby any one mutation generates the same disorder (Figure 1; McClellan and King, 2010).
What does it mean when a disease is heterogeneous?
A heterogeneous medical condition or heterogeneous disease is a medical term referring to a medical condition with several etiologies (root causes), such as hepatitis or diabetes.
How does allelic heterogeneity work?
Allelic heterogeneity is the phenomenon in which different mutations at the same locus lead to the same or very similar phenotypes. These allelic variations can arise as a result of natural selection processes, as a result of exogenous mutagens, genetic drift, or genetic migration.
What is heterogeneity in DNA?
Genetic heterogeneity can be defined as mutations at two or more genetic loci that produce the same or similar phenotypes (either biochemical or clinical).
What is difference between homogenous and heterogenous?
By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers.
What causes locus heterogeneity?
Locus heterogeneity occurs when mutations at multiple genomic loci are capable of producing the same phenotype (ie. a single trait, pattern of traits, or disorder), and each individual mutation is sufficient to cause the specific phenotype independently.
When mutations at different loci can produce the same disease phenotype refers to?
What does heterogeneity mean in medical terms?
Heterogeneous is a word pathologists use to describe tissue that looks very different from one area of the tissue to the next. Differences in colour, shape, and size can make a tissue look heterogeneous. Heterogeneous can be used to describe the way the tissue looks with or without a microscope.
Can a benign tumor be heterogeneous?
In contrast, 91 of the 164 benign lesions (56%) were heterogeneous on T2WI.
What heterogeneity means?
Definition of heterogeneity : the quality or state of consisting of dissimilar or diverse elements : the quality or state of being heterogeneous cultural heterogeneity.
What is allelic homogeneity?
In human genetic disease: Autosomal dominant inheritance. …the same molecular defect (allelic homogeneity), or they may be heterogeneous, such that tens or even hundreds of different mutations, all affecting the same gene, may be seen in the affected population (allelic heterogeneity).
What is phenotypic heterogeneity in biology?
Phenotypic Heterogeneity. Phenotypic heterogeneity is a survival strategy of microbes, enabling a rapid adaptation to a shifted environment without the need for genetic mutation (Fraser and Kaern, 2009; Kaern et al., 2005).
What does heterogeneous mean in medical terms?
Medical Definition of heterogeneous. : not uniform in structure or composition tumors which have a heterogeneous composition by reason of structure and presence of necrosis — Year Book of Endocrinology.
What is the definition of phenotype in English?
The expression of a specific trait, such as stature or blood type, based on genetic and environmental influences. An individual or group of organisms exhibiting a particular phenotype. American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company.
What is phenotypic composition?
phenotype – what an organism looks like as a consequence of the interaction of its genotype and the environment. physical composition, composition, make-up, makeup, constitution – the way in which someone or something is composed.
