FreeMCATPrep Logo

Support us and cryptocurrency!
Try a browser that's faster, safer, ad-free, and earns you cryptocurrency for using it! W3Schools


More Than 475 Free MCAT Questions with Detailed Answers!

Click HERE for your Random Question from our MCAT Question A Day Archive


Practice MCAT Question - Q157 - Answer!

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

The correct answer is (B). If the plant was heterozygous at all three loci (AaBbCc), and each dominant allele contributes 0.5 lb while each recessive allele contributes 0.25 lb, the fruit would weigh 2.25 lb.

Check The Sidebar For Another Practice MCAT Question!! ----->