Hello.
The fibers that connect 2 halves of the brains is the Cerebral hemisphere. Cerebral hemispheres that are separated by a groove, the longitudinal fissure. The brain can thus be described as being divided into left and right cerebral hemispheres.
The other half is the cerebrum, is a vital layer of tissue the thickness of a stack of two or three dimes.
Have a nice day
Adenine, thymine, cytosine and guanine are the four nucleotides found in DNA.