Question

when the alleles in a pair interact, the resulting phenotype reveals the influence of one allele more than that of the other allele. this pattern is called:
○ an additive gene pattern.
○ a dominant-recessive pattern.
○ an on-off switching pattern.
○ a differentiation pattern.

Explanation:

To solve this, we analyze each option:

• An additive gene pattern: Alleles contribute equally, not one more than the other. Eliminate.
• A dominant - recessive pattern: In this, one allele (dominant) has a greater influence on the phenotype than the other (recessive), matching the description.
• An on - off switching pattern: Not a recognized genetic pattern for allele interaction. Eliminate.
• A differentiation pattern: Not related to allele interaction in determining phenotype. Eliminate.

Answer:

B. a dominant - recessive pattern.