Question

Light DNA (${14}_N$) transferred to ${15}_N$ labelled culture medium for replication. The ratio of the total number of ${15}_N$ and ${14}_N$ labeled strands of DNA extracted from the culture after three generations is

• A. 1 : 3
• B. 7 : 1
• C. 1 : 15
• D. 15 : 1

Answer 1

The correct option is A 1 : 3

According to the figure, after three generations hybrid strands(N${}^{(}14$, N$^{15)$) and light strands (N${}^{(}14$, N${}^{(}14$) is in the ratio 1:3

So, the correct answer is "1:3".