Dominance

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A genetic term used when describing an allele whose phenotype is expressed in organisms both homozygous for that allele and heterozygous (it masks another allele - a recessive allele).  

There are three types of dominance:

  1. Complete Dominance - recessive phenotypes are only present in homozygous recessive organisms
  2. Incomplete Dominance - heterozygotes resemble neither the dominant nor the recessive phenotype
  3. Co-dominance - heterozygotes are a mixture of both the dominant and recessive phenotypes[1]

References

  1. Hartl and Jones. (2009), Genetics: analysis of genes and genomes, 7th Edition, Jones and Bartlet


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