Genetics vs the environment is the classical arguement that have raged for 50 years.
Genetics direct the way the brain growth and functions. Environment has big impact also in how we grow, learn and react. Twin studies tell us a lot – However the issues are not resolved.
Genome – well understood. It is more than just DNA. DNA + proteins = CHROMATIN chromosomes. If DNA is hardware then CHROMATIN is the software. It can turn genes on or off. This is very important, 3rd ascept to how and who we are.
Epigenetics is the study of epigenetic inheritance, a set of reversible heritable changes in gene function or other cell phenotype that occur without a change in DNA sequence (genotype). These changes may be induced spontaneously, in response to environmental factors, or in response to the presence of a particular allele, even if it is absent from subsequent generations.
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