"Both alleles affect the phenotype in distinguishable ways."

This statement most accurately describes ______.

Question

"Both alleles affect the phenotype in distinguishable ways."

This statement most accurately describes ______.

BlackTom AI · Accepted Answer

The prompt presents a concept about how alleles contribute to phenotype and asks which description most accurately fits the statement: “Both alleles affect the phenotype in distinguishable ways.”

Option 1: codominance. This matches the idea that both parental alleles contribute distinctly to the phenotype in the heterozygote, so you can observe traits from both alleles rather than a blended or one-dominant expression.

Option 2: recessive dominance. In this case, the dominant allele masks the effect of the recessive allele in heterozygotes, so both alleles do not affect the phenotype in distinguishable ways. The phenotype reflects the dominance relationship rather than a clear contribution from both alleles.

Option 3: incomplete dominance. Here, the heterozygote shows an intermediate phenotype, a blend of the two alleles, rather than each allele producing a distinct, recognizable phenotype. This does not portray both alleles as separately visible.

Option 4: complete dominance. This is another way of describing the situation where one allele completely masks the other in the phenotype, leaving no distinct contribution from the second allele. It contradicts the idea of both alleles having distinguishable effects.

In summary, codominance is the only option that explicitly allows both alleles to be expressed in a way that is observable and distinguishable in the phenotype, whereas the other options describe scenarios where one allele’s effect dominates, blends, or is otherwise not independently evident.

APBIO141-031 with labs 14.04 to 14.06 - Video Quiz

"Both alleles affect the phenotype in distinguishable ways." This statement most accurately describes ______.

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