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Intermediate
In a county science fair review board, students cross two heterozygous mosquito fish lines for a trait showing incomplete dominance. The offspring are 24 dark, 51 intermediate, and 25 light. Which model best fits?
A 3:1 ratio because complete dominance hides the recessive allele.
A 9:3:3:1 ratio because any three phenotypes require two independently assorting genes.
A 1:2:1 phenotypic ratio because heterozygotes have an intermediate phenotype.
A sex-linked recessive pattern because males and females must differ in phenotype.
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