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Practice MCAT Question - Q157

If a polygenic trait in plants involves genes at three different loci, which determine fruit weight, and each dominant allele contributes 0.5 lb, while each recessive allele contributes .25 lb, what would fruits weigh in individuals that are heterozygous at all three loci?

A.  2 lb
B.  2.25 lb
C.  2.5 lb
D.  2.75 lb

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