Which of the Following Is Not True of Threshold Traits

question 28

Multiple Choice

Which of the following is not true of threshold traits?

• A) Expression is significantly affected by environment
• B) Genetic liability must cross a critical value for expression to occur
• C) Monozygotic twins much more likely to both express such traits
• D) Nature of genetic factors involved are poorly understood
• E) They often show continuous variation in phenotype.

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