A nurse has completed a family pedigree on a patient with a known autosomal dominant inheritance disorder.No one else in the family has been affected by this disorder.How does the nurse explain this finding to the patient?
A) Genetic variation occurred via a mutation.
B) Information about the family is incorrect.
C) The patient is not biologically related to the family.
D) The patient's diagnosis must be incorrect.

Question

Quizplus · Accepted Answer

Most autosomal dominant inheritance disorders are seen in families in which multiple members in different generations have been affected by the disorder.However,the variant allele may arise from a mutation,in which case the affected person will be the first known person in the family to be affected.The other options are incorrect.

A Nurse Has Completed a Family Pedigree on a Patient