AP Biologyeasymcq1 pt
In a monohybrid cross of two heterozygotes (Aa × Aa) with complete dominance, the phenotypic ratio is
A.3:1
B.1:2:1
C.9:3:3:1
D.1:1
Explanation
Core Concept
AA and Aa both show the dominant phenotype (3 of 4 boxes), while aa shows the recessive (1 of 4). The Punnett square gives 3:1.
Correct Answer
A3:1
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