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.
The Constitution provides the President 10 days (excluding Sundays) to act on legislation or the legislation automatically becomes law. There are two types of vetoes: the âregular vetoâ and the âpocket veto.â. The regular veto is a qualified negative veto.The President returns the unsigned legislation to the originating house of Congress within a 10 day period usually with a memorandum of disapproval or a âveto message.â Congress can override the Presidentâs decision if it musters the necessary twoâthirds vote of each house.he Constitution provides the President 10 days (excluding Sundays) to act on legislation or the legislation automatically becomes law. There are two types of vetoes: the âregular vetoâ and the âpocket veto.â. The regular veto is a qualified negative veto.