Biology
Grade-10
Easy
Question
Incomplete penetrance occurs as a result of
Genetic factors
Environmental factors
Lifestyle variables
All of the above
Genetic factors
Environmental factors
Lifestyle variables
All of the above
Hint:
All of the above
The correct answer is: All of the above
Penetrance refers to the proportion of people with a particular genetic variant (or gene mutation) who exhibit signs and symptoms of a genetic disorder. If some people with the variant do not develop features of the disorder, the condition is said to have reduced (or incomplete) penetrance.
Reduced penetrance probably results from a combination of genetic, environmental, and lifestyle factors, many of which are unknown. This phenomenon can make it challenging for genetics professionals to interpret a person’s family medical history and predict the risk of passing a genetic condition to future generations.
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