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    Exam 9: Patterns of Inheritance
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    If a Study of Several Pedigrees Demonstratethat Two Parents Arnormal
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If a Study of Several Pedigrees Demonstratethat Two Parents Arnormal

Question 20

Question 20

Multiple Choice

If a study of several pedigrees demonstratethat two parents arnormal but their children express a trait, then thtrait is controlleby


A) a codominant gene.
B) a simple dominant gene.
C) a recessive gene.
D) a sex-linked gene.
E) none of these; no conclusion can be drawn.

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