Allele

noun
/əˈliːl/
One of two or more alternative forms of a gene that occupy the same position (locus) on a chromosome and control the same trait.

✍️ Usage in a UPSC answer

Just as a single gene may express itself through different alleles, India's federal idea is realised through competing institutional variants, each State adapting the constitutional template to its own demographic and developmental locus.

Synonyms

gene variantallelomorphgenetic variantgene formvariant form

🌱 Word Family

allele (n), alleles (n pl), allelic (adj), allelomorph (n), allelomorphic (adj)

🔡 Root

Greek allos = other → allēl- = one another + morphē = form → German AllelomorphAllel

📜 Etymology

From German Allel, abbreviation of Allelomorph, from Greek allēl- ("one another," from allos, "other") + morphē ("form"); first used publicly by Frederick Soddy in 1913.

🧠 Memory Hook

Hear "a-LEAL" echo Greek allos = "other": an allele is an "other version" of the same gene, alternative forms standing side by side at one locus.

Tip: press Alt+S to hear pronunciation

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