In genetics, what is the outcome of two alleles exhibiting incomplete dominance?

Prepare for the ILTS Elementary Education Grades 1–6 (305) Exam. Study with interactive quizzes, flashcards, and detailed explanations. Gear up for success!

Incomplete dominance occurs when two alleles are present in an organism, and they blend together to produce a phenotype that is distinct from either of the individual alleles. This results in a new phenotype that is a combination of the traits associated with the two alleles. For example, if one allele codes for red flowers and another for white flowers, the resulting phenotype might be pink flowers when the two alleles are expressed together. This blending is what distinguishes incomplete dominance from simple dominance, where one trait completely overshadows the other.

The other options do not accurately describe the concept of incomplete dominance. A scenario where one allele results in a recessive trait does not reflect the blending nature of incomplete dominance. Similarly, if the phenotypes remain unchanged, that would indicate complete dominance or codominance rather than incomplete dominance. Finally, stating that it only produces a dominant trait overlooks the key characteristic of incomplete dominance—where a completely new phenotype emerges rather than the expression of dominance.

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