Answer:
The experiment conducted in 1952 by hershey and chase consisted in the use of sulfur to track proteins and radioactive phosphorus to track DNA from T2 phages that infect bacterial cells, the key result was that phage proteins were outside the cell during the infection but the DNA was inside the cells because new phages were obtained with radioactive phosphorus. This allows us to conclude that DNA acts as a genetic material of phage T2
 
        
             
        
        
        
The weather fronts are responsible for the movement of weather across the united states and canada
        
             
        
        
        
Answer:
Harmful
Explanation:
When you have an autoimmune disorder, your immune system does not distinguish between healthy tissue and potentially harmful antigens.
 
        
             
        
        
        
Answer:
Brown is the dominant gene and white is the recessive gene.
Explanation:
If brown were to be dominant then the mice would most likely all be brown unless the got both a white from mom and dad which is most likely due to brown being recessive the dad could be part white you just wouldn't see it. And since the mother is white all of the mice get a white gene from the mom and since the dad most likely has a white gene hidden inside of him only tow mice became fully white while the siblings were brown. 
Hope this helps.