But if the individual carries two alleles in a manner that one is dominant and the other one is recessive, (e.g. AA), the trait that they represent will be expressed. For instance, for an individual carrying two alleles that are both dominant (e.g. The law (or the principle) of dominance states that the presence of a dominant allele will always mask the presence of a recessive allele.Ĭomplete dominance is a form of dominance in the heterozygous condition wherein the allele that is regarded as dominant completely masks the effect of the allele that is recessive. This is according to the principle of dominance. So a dominant phenotype would be one that results from a dominant gene and a recessive phenotype would only result when the dominant is absent. Something that is dominant has complete power or control over something else.
What is complete dominance? To define complete dominance in biology, we must recall what it means to be dominant. The completely dominant alleles are those that are displayed in the phenotype. Recessive alleles will only be seen in the absence of the dominant alleles. Genotypes and phenotypes can give the result of dominant and recessive alleles. The genotype traits are seen through the phenotype – which displays the genes and their properties physically. The combination of those two alleles assigns the organism’s genotype.
The variant form of a gene that usually determines traits is called an allele. Traits can appear in many different forms of a gene.
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