Question

Which of the following is the best example of a trait with a flat reaction norm?...

Which of the following is the best example of a trait with a flat reaction norm?

a. percent lean mass in cattle

b. human height

c. round vs wrinkled seed surface in plants

d. susceptibility to type II diabetes

Homework Answers

Answer #1

c. round vs wrinkled seed surface in plants

xplanation:

If the Norm of Reaction is flat, the phenotype produced over the entire range of environments is constant. This corresponds to what we usually think of as a "genetic": a particular genotype always produces exactly the same phenotype irrespective of environment.

lassic single-gene traits fall into this category: peas are round (RR, Rr) or wrinkled (rr) according to genotype, irrespective of environment  

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