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 is what is there, though this would be in terms of genes not whole chromosomes. And phenotype is what is expressed. Also the eye color example is a good one though don't forget that this is determined by more than just two alleles of one gene, so it's a little simplistic but still a useful example. Genotype not being the same as Phenotype can get a little sticky once you get into codominance or genetic masking. More simply put, take the example of a heterozygote. The subject would have a dominant allele and a recessive one for a gene.