Tail length in a certain species of armadillo falls along a continuum, following a normal distribution. Assuming that environmental factors do not play an important role in determining tail length, this type of variation probably reflects _____.
Choose one answer.
a. pleiotropy
b. epistasis
c. complete dominance
d. incomplete dominance
e. polygenic inheritance
E. Polygenic Inheritance
This is when two or more genes interact to affect only one phenotype.
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