The Genetic Variation, Mutagens produce the greatest variety. This category includes radiation (UV light, Xrays), chemical, etc. <span>They change DNA/RNA, thereby increasing the number of mutations, which in turn, leads to producing the greatest variety.</span>
        
             
        
        
        
Answer:
50%
Explanation: 
         Z        O
z    Zz        zo
z    Zz        zo
The males will have two copies of the alleles of the genes present on the Z chromosomes. As females have only one Z chromosome, they will have only one allele for the genes present on the Z chromosome. 
The results from the punnet square show that there will be chance that the females of the F2 progeny will have curved-beaks. 
 
        
             
        
        
        
Answer:
Sperm cannot be delivered to the urethra.
Explanation:
Just did it and got it correct