The mechanism that affected the gene pool of the immigrants that entered the United states Through Ellis Island is Gene flow.
Gene flow involves the movement of genes or alleles between interbreeding populations of a particular species. In other words it is the movement of genes from one population to another population. Actually it may be an important aspect of evolution; evolution can occur as a result of genes being transferred from one population to another. Gene flow occurs when there is migration, since the loss or addition of people can easily change pool frequencies even without no other evolutionary mechanisms operating.  
        
                    
             
        
        
        
<span>A heterozygous individual is if a mutation occurs in just one copy of the gene.
If both copies of the gene are mutated than the individual is homozygous</span>
        
             
        
        
        
➜ <u>The important processes essential for maintaining life are</u>:
- Nutrition.
- Respiration.
- Transportation.
- Breathing.
- Movement.
- Excretion.
- Control and coordination.
 
        
             
        
        
        
Answer:
forced people to improve their morals.
Explanation:
The prohibition prevent people from consuming alcohol , which is dangerous for their health and overall well-being so it is automatically improving the morals of the people by forcing people not to consume alcohol. This question refers to the law that 'prohibited' people from consuming alcohol, since it is not an awareness campaign but a law that tried to improve the morals of the people so it is a <u>Noble experiment</u>.