In man , gene producting the disease phenyl ketonuria alos produces an number of abnormal phenotypic traits, which are collelctively syndrome. This gene results mental retardation, whdely spaced incisors, pigmented patches on the skin and excessive sweating such types of genes are called
A. Polgene
B. Pleiotropic gene
C. Lethal gene
D. Supplimentary gene
