What is an a l l e l e
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An allele is a variation or alternative form of a gene. Genes are segments of DNA that provide instructions for producing specific traits or characteristics in organisms. Each gene typically exists in multiple forms or versions called alleles.
These alleles can vary in their sequence of nucleotides, which are the building blocks of DNA. Variations in the sequence can result in different traits or variations in the expression of genes. For example, a gene related to eye color may have different alleles such as blue, brown, or green, which determine the specific eye color of an individual.
Individuals typically inherit one copy of each gene from each parent, and the combination of alleles they inherit determines their genetic makeup and traits. Alleles can have different effects on gene expression, leading to variations in physical characteristics or predisposition to certain diseases.