Allele
An alternative version of a gene containing a different base sequence
An allele is a variant form of a gene that arises due to mutations or genetic recombination events. Genes are instructions that control the development and functioning of all living organisms. Alleles are the different versions of a gene that can exist in individuals of the same species. For example, the gene that controls the inheritance of eye color has different alleles that determine whether a person will have blue, brown, green, or grey eyes.
Each individual inherits one allele of each gene from each of its parents, forming a pair of alleles. If the two alleles in a pair are the same, the individual is said to be homozygous for that trait, and if they are different, the individual is heterozygous. The expression of the trait depends on the interaction between the two alleles. In some cases, one allele will be dominant over the other, and it will determine the phenotype or observable characteristic of the trait. In other cases, both alleles will have an effect on the phenotype, resulting in a blended or intermediate trait.
More Answers:
Role of Chromosomes: An Overview of Genetic Inheritance and its Significance in Disease Diagnosis and ResearchGenotype: The Role of Inherited Genes in Determining Human Traits
Paving the way for desirable traits: concept and process of pure breeding in agriculture