Answer: A trait that is affected by many factors, both genetic and environmental, that enhance, halt, shape, or alter the expression of genes, resulting in a phenotype that may differ markedly from the genotype, is said to be MULTIFACTORIAL.
Explanation: Multifactorial inheritance may be presented by a model in which liability to a disorder is dependent on combination of genetic factor and environmental factor. Examples of trait with this mode of inheritance are neural tube defects, cleft lip and congenital dislocation of the hip.
