The Seventeenth Amendment in the National Archives. The Seventeenth Amendment (Amendment XVII) to the United States Constitution established the popular election of United States Senators by the people of the states.riginally, under Article I, Â§ 3, Clauses 1 and 2 of the Constitution, each state legislature elected its state's senators for a six-year term. Each state, regardless of size, is entitled to two senators as part of the Connecticut Compromise between the small and large states.
Development is the process through which an embryo becomes an adult organism and eventually dies. Through development, an organism's genotype is expressed as a phenotype, exposing genes to the action of natural selection.
Genotype-phenotype distinction. From Wikipedia, the free encyclopedia. The genotypeâphenotype distinction is drawn in genetics.  Genotype  is an organism's full hereditary information.  Phenotype  is an organism's actual observed properties, such as morphology, development, or behavior.This distinction is fundamental in the study of inheritance of traits and their evolution.enotype-phenotype distinction. From Wikipedia, the free encyclopedia. The genotypeâphenotype distinction is drawn in genetics.  Genotype  is an organism's full hereditary information.  Phenotype  is an organism's actual observed properties, such as morphology, development, or behavior.