Polygenic Trait Aspects. Polygenic trait molding is done mostly with the environment and genes. More than one gene determines these traits, with each gene giving a small, yet additive effect. Multifactorial traits do not exhibit Mendelian ratios, and are determined between genes, or a gene, and the environment.olygenic Trait Aspects. Polygenic trait molding is done mostly with the environment and genes. More than one gene determines these traits, with each gene giving a small, yet additive effect. Multifactorial traits do not exhibit Mendelian ratios, and are determined between genes, or a gene, and the environment.
Definition of Sibilance. Sibilance is a special case of consonance in which the repeated consonant sound is either s, sh, z, or any of the other recognized sibilant sounds. Sibilance occurs when the repetition of these specific consonants are in close proximity.
Historical Examples. 1  She sighed, and the sibilance of it echoed with a strange lingering note between those high gray walls. Stubble George Looms. 2  Her clan took the word up, and for a time the sibilance of it was like a hiss in the room. The Imitator Percival Pollard.