Question

how are polygenic and multifactorial traits different?
○ polygenic traits are influenced by nutrition and diet, whereas multifactorial traits are not.
○ there are more kinds of polygenic traits than multifactorial traits.
○ polygenic traits are influenced by the number of traumatic life events, whereas multifactorial traits are influe
the levels of brain chemicals.
○ polygenic traits are genetically based, whereas multifactorial traits have both genetic and environmental influ
○ polygenic traits show a continuous range of phenotypic variation, whereas multifactorial traits show several
phenotypes.

Explanation:

Polygenic traits are determined by multiple genes. Multifactorial traits, in addition to genetic factors, are also affected by environmental factors like nutrition, lifestyle, etc. Option D correctly captures this key difference. Option A is wrong as multifactorial traits are influenced by nutrition. Option B has no basis in the definition of these traits. Option C describes incorrect influencing factors. Option E is wrong as both can show continuous phenotypic variation (e.g., height - polygenic; many multifactorial traits also show a range).

Answer:

D. Polygenic traits are genetically based, whereas multifactorial traits have both genetic and environmental influ