112 results found

Search Results for: phenotype

Phenotype

Phenotype refers to the observable characteristics of an organism as a multifactorial consequence of genetic traits and... Read More

Incomplete dominance

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

Phenotypic ratio

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

INTERMEDIATE PHENOTYPE

INTERMEDIATE PHENOTYPE is a phenotype of an offspring expressing a mixture of the phenotypes of the... Read More

Epistasis

Epistasis Definition What is epistasis in genetics? How does epistasis occur? The epistasis definition, in biology, refers... Read More

Complete dominance

Complete Dominance Definition Genetics is the study of how traits are inherited by organisms and in what ways these... 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

Genotype

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

Phenotype frequency

A ratio stating the number of times a specific phenotype occurs in a population in a single... 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

Genotypic ratio

Genotypic Ratio Definition To understand 'Genotypic ratio', let us first understand the terms: 'Genotype' and 'Phenotype'.... Read More

Homozygous

Homozygous Definition Diploid organisms that have a genotype of identical alleles for a trait or phenotype at a specific... Read More

Cis trans test

Cis trans test (Science: molecular biology) The complementation test with two or more interacting genes placed in cis and... 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

Infectious heredity

Definition noun A non-Mendelian inheritance in which an infectious particle within the cell of the host may bring changes in... Read More

Inheritance and Probability

Reviewed by: Mary Anne Clark, Ph.D.Gregor Mendel, an Austrian monk, is most famous in this field for his study... Read More

Y chromosome

Y chromosome Definition The Y chromosome constitutes one member of the pair of sex chromosomes within an organism, a common... Read More

Dominance

Reviewed by: Mary Anne Clark, Ph.D.The previous tutorial investigated Gregor Mendel and how he found trends in... Read More

Fitness

A competing variant's frequency is rising in relation to other competing variants in a population under the biological... Read More

Polygene

Definition noun, plural: polygenes A group of genes that produces a specific phenotype or trait only when expressed... Read More

Genomic imprinting

Definition noun A phenomenon in which the phenotype of the offspring depends on the source of the chromosome containing the... 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

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

Pleiotropy

Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... Read More

Lethal mutation

Lethal Mutation Definition Genetic mutations come from changes in the DNA structure or sequencing in an organism. Often... Read More

Neomorphic mutation

Definition noun (genetics) A type of mutation wherein the change in gene leads to an atypically new function of the... Read More

Non-Mendelian inheritance

Definition noun (genetics) A type of biological inheritance wherein the patterns of phenotypes do not accord with those as... Read More

Relative fitness

Definition noun A measure of biological fitness wherein the reproductive rate (of a genotype or a phenotype) is relative to... Read More

True breeding

Definition noun A kind of breeding in which the parents with a particular phenotype produce offspring only with the same... 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

Obligate parasite

Parasitism is a form of symbiosis that occurs between a parasite and its host. The parasite is the organism that generally... Read More

Antimorphic mutation

Definition noun (genetics) A type of mutation wherein the change in gene alters the activity of the gene such that it... Read More

Overdominance

Definition noun (genetics) A type of dominance characterized by a phenotype that is more pronounced in a heterozygote... Read More

Indicator Species

A species which is a good indicator of the living conditions in a particular habitat. The peppermoth will express a black... Read More

Polygenic trait

Polygenic Trait Definition Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. These genes... Read More

Traits

Traits Definition "Trait" is a rather well-known word in the English language. What does trait mean?A trait is defined... Read More

Probability

Probability DefinitionHow do you define probability? In science, probability is a measurement tool that calculates the... Read More

A Look Into Natural Selection and its Mechanisms

Charles Darwin is credited with outlining the fundamentals of evolution. He was a smart and eager pupil and protégé, and... Read More

Test cross

Definition noun Crossing an organism with dominant genotype to a recessive homozygote for a specific phenotype in order to... Read More