What Does the Pattern of Inheritance in This Pedigree Indicate

Multiple Choice

What does the pattern of inheritance in this pedigree indicate about the disease allele?

A) The disease allele is recessive.
B) The disease allele is dominant.
C) There is no indication that the disease allele is either dominant or recessive.
D) The disease allele is not inherited but arises only by a new mutation in affected individuals.