Dominant allele: Difference between revisions
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A dominant allele is one copy of the gene that will always be expressed whether homozygous or heterozygous. The phenotype of the organism will show the dominant trait whenever this allele is present. | A dominant allele is one copy of the gene that will always be expressed whether homozygous or heterozygous. The phenotype of the organism will show the dominant trait whenever this allele is present. | ||
Dominant alleles are often designated a capital letter for example (Ww) - here the W represents the dominant wildtype allele whilst w is the recessive allele. <ref>Hartl. D and Ruvolo. M, (2012) Genetics. Analysis of Genes and Genomes, 8th Edition, Burlington: Jones & | Dominant alleles are often designated a capital letter for example (Ww) - here the W represents the dominant wildtype allele whilst w is the recessive allele.<ref>Hartl. D and Ruvolo. M, (2012) Genetics. Analysis of Genes and Genomes, 8th Edition, Burlington: Jones &amp; Barlett Learning.</ref> | ||
(WW) - Homozygous dominant (W phenotype expressed) | (WW) - Homozygous dominant (W phenotype expressed) | ||
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<br>'''References''' | <br>'''References''' | ||
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Revision as of 16:11, 18 November 2013
A dominant allele is one copy of the gene that will always be expressed whether homozygous or heterozygous. The phenotype of the organism will show the dominant trait whenever this allele is present.
Dominant alleles are often designated a capital letter for example (Ww) - here the W represents the dominant wildtype allele whilst w is the recessive allele.[1]
(WW) - Homozygous dominant (W phenotype expressed)
(Ww) - Heterozygous (W phenotype expressed)
(ww) - Homozygous recessive (w phenotype expressed)
References
- ↑ Hartl. D and Ruvolo. M, (2012) Genetics. Analysis of Genes and Genomes, 8th Edition, Burlington: Jones & Barlett Learning.