Polygenic Inheritance May Result in a Continuum of Phenotypes Because

Multiple Choice

Polygenic inheritance may result in a continuum of phenotypes because

A) as the number of genes controlling a trait increases and the influence of environment variation becomes greater, there is a blurring of discreteness
B) the alleles for each gene are either completely dominant or recessive
C) additive genes mean the characters are meristic
D) correlations among various traits are always positive