alleryE. coli divides every 20 min. After 80 min in 14N, the light to hybrid DNA ratio is
A1:1
B3:1
C15:1
D7:1
Answer & Solution
Correct answer: D. 7:1
Four generations give 16 DNA molecules, of which only 2 are hybrid, so light to hybrid is 14:2 or 7:1.
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