a) Gọi N là số nucleotit của gen
Ta có: \(3,4.\dfrac{N}{2}=5100\)
=> N = 3000 (nu)
\(A=T=3000.25\%=750\left(nu\right)\)
\(G=X=\dfrac{3000-750.2}{2}=750\left(nu\right)\)
b)
Mạch 1 có \(\left\{{}\begin{matrix}A=450\left(nu\right)\\T=300\left(nu\right)\\G=250\left(nu\right)\\X=500\left(nu\right)\end{matrix}\right.\)
Mạch 2 có \(\left\{{}\begin{matrix}A=300\left(nu\right)\\T=450\left(nu\right)\\G=500\left(nu\right)\\X=250\left(nu\right)\end{matrix}\right.\)