A phenotype results from the expression of an organism's genes as well as the influence of environmental factors and the interactions between the two. When two or more clearly different phenotypes exist in the same population of a species, the species is called polymorph.The genotype of an organism is the inherited instructions it carries within its genome.he concept of phenotype can be extended to variations below the level of the gene that affect an organism's fitness. For example, silent mutations that do not change the corresponding amino acid sequence of a gene may change the frequency of guanine-cytosine base pairs (GC content).
President Woodrow Wilson persistently vetoed the Immigration Act of 1917, however Congress overrode his veto and put this law into effect in May 1917. This act increased the head tax on each adult immigrant to $8, barred most Asian immigrants, and required all adults to take a literacy test.
Senator Russ Feingold (D-WI) and Senator John McCain (R-AZ) introduced legislation of a limited version of the line-item veto. This bill would give the president the power to withdraw earmarks in new bills by sending the bill back to Congress minus the line-item vetoed earmark.ill Clinton echoed the request in his State of the Union address in 1995. Congress attempted to grant this power to the president by the Line Item Veto Act of 1996 to control  pork barrel spending , but in 1998 the US Supreme Court ruled the act to be unconstitutional in a 6-3 decision in Clinton v. City of New York.