Answer:
0.325 microliters 
Explanation:
1 microgram = 1000 nanograms
DNA sample concentration= 1000 X 0.6 = 600 nanograms / microliters
We need a total of 50 microliter reactions, and the concentration should be 3.9 nanograms per microliter.
So, we need total 50 X 3.9 = 195 nanograms in 50 microliters.
Therefore, it required 195 / 600 = 0.325 microliters of DNA sample to be transferred.
 
        
             
        
        
        
<span>The sequence of three bases (triplet) in a transfer RNA molecule</span>
        
             
        
        
        
Emissions from industries as they burn fossil fuels
I believe so (: 
        
             
        
        
        
The answer would be "Father's father" 'cause when boy born, he receives Y chromosome from his father and not X so he can't transfer it to his daughter, as he will transfer his X chromosome to her.
In short, Your Answer would be Option D
Hope this helps!