Dominant gene（Dominant allele）It refers to a pair of heterozygotes with relative trait gene control, the gene that can make them display the trait or the gene that plays a decisive role in the trait.[1]
There may be an explicit implicit relationship between one allele. If the function of one allele can inhibit the function of another allele, we call the former gene dominant to the latter gene. On the contrary, the latter gene is recessive to the former gene.For example, among the alleles that control the presence or absence of horn, the horn free gene is the dominant gene and the horn free gene is the recessive gene.If the dominant gene can completely inhibit the function of the recessive gene, we call this relationship the complete dominance relationship. If the dominant gene cannot completely inhibit the function of the recessive gene, we call it the complete dominance relationshipIncomplete dominanceRelationship.For the convenience of discussion and presentation,Dominant alleleThe recessive alleles are usually represented by upper case letters, and the corresponding lower case letters.[2]
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Dominant gene（dominant allele）Controldominant characterAllele ofgene。In diploid organisms, genes that can be expressed in phenotype under heterozygous state are called dominant genes.Dominant genes can often form a functional substance (such as enzyme), while its recessiveAlleleThen due to the correspondingnucleotideThe mutation occurred and the substance could not be produced, soHeterozygoteOnly the dominant gene can show normal function (dominance).[3]
