Dominant allele

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Dominant Allele

A Dominant Allele (pronounced: /ˈdɒmɪnənt əˈliːl/) is a variant form of a gene that is fully expressed in an organism's phenotype, even if only one copy is present. This is in contrast to a recessive allele, which is only expressed when two copies are present.

Etymology

The term "dominant allele" originates from the Latin word "dominans" meaning "ruling, governing". The term "allele" is derived from the Greek word "ἄλλος" (allos), meaning "other".

Related Terms

  • Genotype: The genetic makeup of an organism, including both dominant and recessive alleles.
  • Phenotype: The observable traits or characteristics of an organism, determined by its genotype and environmental influences.
  • Homozygous: An organism that has two identical alleles for a trait.
  • Heterozygous: An organism that has two different alleles for a trait.
  • Recessive allele: An allele that is masked when a dominant allele is present.

See Also

External links

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