The egg came first this was found out In July 2010
        
                    
             
        
        
        
Rosalind Franklin contributed to the understanding of DNA by discovering It's shape and structure. 
        
             
        
        
        
Answer:
TAC GCA TTA ATA 
and apparently my answer needs to be 20 charcters long
 
        
             
        
        
        
Answer:
improper disposal of sewage
 
        
             
        
        
        
Sickle cell anemia is a genetic condition that distorts the shape of the hemoglobin. This reduces the capacity of the red blood cells to carry oxygen. Another effect is that the distorted red blood cells come together forming a heavy and compact collection of cells that can block the flow of blood. The sedimentation rate is increased by sickle cell anemia.