In fact, we actually use numerous parts of our brain to read. Deficiencies in particular mental skills, most often due to normal variation, not brain damage, are the neurological basis for a reading problem. Numerous studies have demonstrated a high correlation between the ability to read and the ability to manipulate sounds in words. In other words, many students with reading problems struggle to hear, analyze and separate the individual phonemes in words. Other factors that impact learning to read to lesser degrees include speech problems, attention and visual processing.
Inheritance is also a factor.
But poor reading is not inherited. Reading cannot be coded in genes anymore than other high skills like typing or playing a piano. What can be inherited is the tendency to have difficultly blending, segmenting, and analyzing sounds. But these problems can be corrected .