If Messelson and Stahl's experiment is continued for four generations in bacteria, the ratio of 
containing DNA in the fourth generation would be:
Text Solution
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Meselson and Stahl found that DNA of the first generation was hybrid or intermediate 
and 
. It settled in caesium chloride at a level higher than the fully labelled DNA of parent bacteria 
. The second generation of bacteria after 40 minutes, contained two types of DNA, 
light 
and 
intermediate 
.
The third generation of bacteria after 60 minutes contained two types of DNA, 25% intermediate ( 
) and 
light 
in 
ratio. The fourth generation after 80 minutes contained 
and 
DNA in 
ratio.
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