(d)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 labeled DNA of parent
The second generation of bacteria after 40 minutes, contained two types of DNA,
50% light() and
The third generation of bacteria after
60minutes contained two types of DNA, 25%intermediate (N15 N14)
and 75% light (N14 N14) in 1:3 ratio. The fourth generation after80 minutes
contained 12.5%N15 N14 and 87.5% N14N14 DNA in 1:7 ratio.
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