Genes exhibiting multiple effects are known as

In humans,the gene responsible for Phenylketonuria produces multiple phenotypic expressions,collectively known as a syndrome. This gene causes mental retardation,broad incisor teeth,skin pigmentation,and excessive sweating. What is this type of gene called?

When one gene controls two or more different characters simultaneously,the phenomenon is called

The colour of the flower in pea is always linked with

In pea plant,the genotype $(BB)$ shows:

In $Drosophila$,the gene for white eye mutation is also responsible for the depigmentation of body parts. Thus,a gene that controls several phenotypes is called: