\(a,\) \(L=C.34=4080\left(\overset{o}{A}\right)\)
\(b,\) \(N=20.C=2400\left(nu\right)\)
\(\Rightarrow20\%N=480\left(nu\right)\)
Theo bài ta có hệ : \(\left\{{}\begin{matrix}A-G=480\\2A+2G=2400\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}A=T=840\left(nu\right)=35\%N\\G=X=360\left(nu\right)=15\%N\end{matrix}\right.\)
TK:
https://hoc24.vn/cau-hoi/mot-gen-chua-120-vong-xoan-va-co-20-adenin-a-tinh-tong-so-nu-gen-chieu-dai-khoi-luong-phan-tu-cua-genb-tinh-so-nu-loai-atgxmong-mn-giup.1750165026252