45 results found

Search Results for: locus

Locus

Definition noun, plural: loci (general) A place, space or locality, especially a centre of an activity. (mathematics) The... Read More

Genetic locus

Definition noun, plural: genetic loci The location of a gene (or of a significant sequence) on a chromosome or on a linkage... Read More

Multiple alleles

Alleles are the pairs of genes occupying a specific spot called locus on a chromosome. Typically, there are only two alleles... Read More

Polymorphism

Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... Read More

Allele

Allele Definition What are alleles? An allele is a term coined to describe a specific copy of a gene. Genes, the DNA... Read More

Non-Mendelian Inheritance

Reviewed by: Mary Anne Clark, Ph.D. The inheritance patterns seen in Mendel's monohybrid and dihybrid crosses... Read More

Codominance

Codominance Definition Codominance is a form of inheritance wherein the alleles of a gene pair in a heterozygote are fully... Read More

Genetic equilibrium

Definition noun A condition where a gene pool is not changing in frequency because the evolutionary forces acting upon the... Read More

Phenotypic ratio

Phenotypic Ratio Definition How would one define phenotypic ratio? The correlation between the amount of offspring that... Read More

Actions of Caffeine in the Brain with Special Reference to Factors That Contribute to Its Widespread Use

IV. Actions of Caffeine on Brain Functions and Behavior Having discussed the molecular and neuronal actions of caffeine,... Read More

Neuromelanin

Definition noun A type of melanin pigment present in parts of the brain, particularly in the neurons of substantia nigra and... Read More

Allelic exclusion

Allelic exclusion (Science: cell biology, genetics) The process whereby one or more loci on one of the chromosome sets in a... Read More

Dominant

Dominant Definition The word dominant or dominant trait is commonly used in biology. The general meaning of dominant is to... Read More

Ki

Definition (genetics) Gene knock-in, as in genetic engineering method (chemistry) A symbol for the dissociation constant of... Read More

Zygosity

Definition noun (genetics) The degree of similarity or the dissimilarity of the DNA sequences in specific coding segments,... Read More

Inhibitory postsynaptic potential

Inhibitory Postsynaptic Potential Definition An inhibitory postsynaptic potential is a type of synaptic potential. It is... Read More

Consciousness and Behavior

States of Consciousness Defined either by (1) behavior - ranging from attentive and alert to coma and (2) electrical... Read More

Incomplete dominance

Incomplete Dominance Definition After Gregor Mendel discovered inheritance laws, the term ''incomplete dominance'' was... Read More

Monohybrid cross

Definition noun A genetic cross between homozygous individuals but with different alleles for a single gene locus of... Read More

Chromosomal mutation

Every living thing is made up of DNA. Our DNA is what makes us unique and different in the world. Our DNA is made up of... Read More

Genetic Control – On and Off Genes

Reviewed by: Mary Anne Clark, Ph.D. This lesson looks at the various factors involved that affect growth and... Read More

Law of Segregation

Mendel’s Laws of Inheritance The father of genetics, Gregor Mendel, reported his findings in 1860 that were initially... Read More

Polygenic inheritance

Polygenic inheritance refers to the kind of inheritance in which the trait is produced from the cumulative effects of many... Read More

Epistasis

Definition noun, plural: epistases (genetics) The interaction between nonallelic genes at two or more loci resulting in one... Read More

Somatotroph

Definition noun, plural: somatotrophs The hormone-secreting cell in the anterior pituitary that particularly releases... Read More

Nervous System

    THE is the most complicated and highly organized of the various systems which make up the human body. It is the... Read More

Milieu

milieu 1. Surroundings; environment. 2. In psychiatry, the social setting of the mental patient, e.g., the family setting or... Read More

Homozygous

Definition adjective (genetics) Of, or pertaining to an individual (or a condition in a cell or an organism) containing... Read More

Parthenogenesis

To reproduce, by definition, means to produce new offspring. The process is referred to as reproduction, which is one of the... Read More

Locomotion

Definition noun The ability of cells or organisms to move and propel itself from place to place Supplement Locomotion in... Read More

Diploid

Diploid Definition Let's first understand the meaning of the word - diploid. From the words ‘di’, meaning "two", and... Read More

Genotype

Genotype Definition Genotype is the genetic makeup of an individual cell or organism that determines or contributes to its... Read More

Wild type

Definition noun (1) The typical (or the most common) form, appearance or strain existing in the wild. (2) The normal,... Read More

Nidus

Definition noun, plural: niduses or nidi (1) A nest for insects or small animals; a breeding place. (2) A locus of infection... Read More

Linkage map

Definition noun A genetic map showing the relative positions of genetic markers along a chromosome that is determined by... Read More

Heterozygous

Heterozygous Definition adjective (genetics) Of, or pertaining to an individual (or a condition in a cell or an organism)... Read More

Genetic map

Definition noun (1) A list of ordered genetic loci for a particular genome. (2) A map of the relative positions of genetic... Read More

Flanking region

Flanking region (Science: molecular biology) The dna sequences extending on either side of a specific locus or... Read More

Neutral mutation

Neutral Mutation Definition What is a neutral mutation? Neutral mutations are the alterations in the DNA that are... Read More

Growth hormone

Definition noun, plural: growth hormones A polypeptide hormone that in humans and other animals essentially promotes... Read More