The answer is simple, genes are inherited and traits are your own uniqueness, genes will have an influence on your traits, so if you are a loud person, that will be one of your traits, and if a parent is a loud person, you will have most likely inherited that gene from them, so the answer is one gene controls many traits because the gene was there first
Pleiotropy occurs when one gene influences multiple, seemingly unrelated phenotypic traits (those you see). A series of defects that affect multiple systems but is caused by one defective gene.
Alleles
A gene has all the traits of the organism
Predation causes traits that enable prey to evade predators to be favoured in the population gene pool.
Traits that are controlled a multiple gene loci. Polygenic traits.
Single gene diseases only effect one typeof gene where im a complex genetic disease many genes are effected. An example of a single gene diseas is sickle cell anemia. Cancer would be an eexample of a complex gene disease.
Mutations create variation in the gene pool by causing new traits to appear
Mutations can occur in gene processing errors.
Gene
Gene
a gene