The allele that determines the phenotype of an individual organism when two different copies are present in the genotype is dominant allele.
An allele is one of a number of alternative forms of the same gene occupying a given position, or locus, on a chromosome.
An allele is usually present in two forms in a gene, which can either be the following;
The dominant allele is the allele that expresses itself in an heterozygous condition i.e. when paired with a different allele.
On the other hand, a recessive allele is the allele that is masked by a dominant allele or trait.
Therefore, it can be said that the allele that determines the phenotype of an individual organism when two different copies are present in the genotype is dominant allele.
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