genetics

How Gene Expression Affects Mental Health

Did you know that one in five Americans suffers from mental illness?  When you hear the phrase “mental illness”, what comes to mind?  The American Psychiatric Association defines it like this, “Mental illnesses are health conditions involving changes in emotion, thinking or behavior (or a combination of these). Mental illnesses can be associated with distress …

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Personality Disorders Part 2

Personality Disorders Part 2 Some personality disorders are commonly associated with dramatic, overly emotional or unpredictable thinking or behavior. These disorders include antisocial personality disorder, borderline personality disorder, histrionic personality disorder and narcissistic personality disorder. Antisocial Personality Disorder Disregard for others’ needs or feelings Constant lying, stealing, using aliases, conning others Repeated problems with the …

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Understanding the Genetic Roots of Marijuana Use

Research on marijuana use disorders has greatly expanded as more states legalize marijuana use. This includes studies that help uncover the connections between genetic roots and marijuana use disorders. An international team of researchers and scientists at Washington University School of Medicine in St. Louis found two regions in our DNA that are believed to …

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Genetics of Populations as Related to Health and Disease

Specific diseases and health issues can be directly connected to the genetics of populations. The distribution of genetic variations differ greatly among human populations. This is largely due to their historical patterns of mutation, migration, reproduction, mating, selection, and genetic drift. Inherited mutations usually occur during gametogenesis within a single individual and eventually passed onto …

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Sickle Cell Disease- A Single-Gene Disorder

A prime example of a single-gene disorder is sickle cell disease. This refers to an autosomal recessive blood disorder caused by a variant of the β-globin gene called sickle hemoglobin (Hb S).  With sickle cell disease, a single nucleotide substitution (T→A) in the sixth codon of the β-globin gene results in the substitution of valine …

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