The fact that two family members who share a genetic disease phenotype are more likely to participate in a family study than two who are discordant is a form of:
A) Ascertainment bias
B) Experimental selection
C) Population stratification
D) Type 1 error
E) Familial aggregation

Question

Quizplus · Accepted Answer

Ascertainment bias occurs when the probability of inclusion in a study is not random, but influenced by factors related to the study's focus, such as the presence of a particular disease phenotype in family studies.

The Fact That Two Family Members Who Share a Genetic