If a genetic counselor was examining a pedigree chart and noticed an occurrence of a disease in every generation, the counselor would most likely assume that the disease was caused by:

A new reoccurring mutation.

An autosomal recessive disorder.

A chromosomal abnormality.

An autosomal dominant disorder.

Having an extra set of chromosomes.

Master Autosomal Inheritance with a bite sized video explanation from Jason Amores Sumpter