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Answer:
Recessive allele
Explanation:
A dominant allele is one that always determines the phenotype when present. On the other hand, a recessive allele is one that is not expressed when its paired allele is dominant. With eye color, the brown eye allele is dominant to the blue eye allele
A gene that is not expressed when paired with a dominant allele is called a recessive allele. Thus, the correct option is D.
An Allele may be defined as one or two or more alternative forms of a gene.
A dominant allele when present, determines the nature and appearance of phenotype. A recessive allele may never express itself when present with a dominant allele because its effect is masked by the presence of a dominant allele.
For example, T is dominant over t. The heterozygous genotype Tt represents the phenotype of tall plants rather than short ones. The phenotype of short plants is only expressed when both the recessive alleles "tt" is present.
Therefore, a gene that is not expressed when paired with a dominant allele is called a recessive allele. Thus, the correct option is D.
To learn more about Dominant and recessive alleles, refer to the link:
https://brainly.com/question/14419967
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