If a Genetic Counselor Examines a Pedigree Chart and Notices

Multiple Choice

If a genetic counselor examines a pedigree chart and notices an occurrence of a disease in every generation,the counselor would assume that the disease was caused by

A) a new reoccurring mutation.
B) an autosomal recessive disorder.
C) a chromosomal abnormality.
D) an autosomal dominant disorder.
E) having an extra set of chromosomes.