Dominance: Difference between revisions

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Incomplete Dominance - heterozygotes resemble neither the dominant nor the recessive phenotype  
Incomplete Dominance - heterozygotes resemble neither the dominant nor the recessive phenotype  


Co-dominance - heterozygotes are a mixture of both the dominant and recessive phenotypes<ref>Hartl &amp;amp; Jones. (2009), Genetics: analysis of genes and genomes, 7th Edition, Jones and Bartlet</ref>  
Co-dominance - heterozygotes are a mixture of both the dominant and recessive phenotypes<ref>Hartl and Jones. (2009), Genetics: analysis of genes and genomes, 7th Edition, Jones and Bartlet</ref>  


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Revision as of 16:22, 17 November 2011

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:

Complete Dominance - recessive phenotypes are only present in homozygous recessive organisms

Incomplete Dominance - heterozygotes resemble neither the dominant nor the recessive phenotype

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