What Can Be Inferred About a Genetic Disorder That, When

question 33

Multiple Choice

What can be inferred about a genetic disorder that, when it occurs in monozygotic twins, affects one twin 80% of the time and affects both twins only 20% of the time?

• A)Expression of homologous genes is influenced by the gender of the parent who contributed them.
• B)Nongenetic factors can influence the expression of identical alleles.
• C)The mutation occurred in a somatic cell rather than a germ cell.
• D)Mutation repair is incompletely penetrant.

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Definitions:

Schizophrenia

A chronic and severe mental disorder that affects how a person thinks, feels, and behaves, characterized by episodes of psychosis including delusions, hallucinations, and disorganized thinking.

Delusions

Odd and false belief systems.

Disordered Perceptions

Abnormal interpretations or experiences of sensory information.

Psychotherapy

A therapeutic treatment involving psychological methods, primarily when communication between a trained therapist and a client is used to treat emotional and psychological disorders.