Humans are a
combination of nature and nurture. Nature refers to genetics; your chromosomes (and
their genes) that contain 99% of all the DNA (deoxyribonucleic acid) in your
brain and body. Nurture refers to epigenetics; your cellular memories, hormones,
and how they influence your chromosomes and genes. (Epigenetics sometimes can turn chromosomes on or turn chromosomes off.) If everything goes according to
plan, every time your cells replace themselves or divide and multiply, the
genetic information is accurately replicated. Unfortunately, this is a complex
process and not as fool-proof and straightforward as one might hope.
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