Research has found that those who have experienced abuse as a child may be at an increased risk for developing PTSD if they experience trauma as an adult because of ________ (organic molecules that attach to chromosomes to turn specific genes on or off. )

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Epigenetic marks are chemical modifications that can switch genes on or off in response to environmental factors, such as trauma. Research has found that childhood abuse can lead to changes in epigenetic marks, which may increase the risk of developing PTSD if an individual experiences trauma later in life.

Research Has Found That Those Who Have Experienced Abuse as a Child