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SAT® Subject Test in Biology

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Moderate

Dihybrid Cross Ratios

SATBIO-1Y4GKX

Assuming independent assortment of alleles, the expected phenotypic ratio from a dihybrid cross is

A

1: 1: 1: 1

B

4: 0: 4: 0

C

9: 3: 3: 1

D

9: 3: 4

E

4: 2: 8: 2