The gene disorder phenylketonuria is an example of

Observe the phenotypic effects of a gene with $2$ alleles $B$ and $b$ in pea plant.

Genotype	Starch grain size and Seed shape
$BB$	Large,Round
$Bb$	Intermediate,Round
$bb$	Small,Wrinkled

Which of the following is incorrect in concern to above facts $:-$

Define the term: Pleiotropy.

What is it called when a single gene influences more than one trait?

Which of the following is an example of a pleiotropic gene?

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?