In the following pedigree charts, the mutant trait is shaded black. The gene responsible for the trait is

The correct option is B Dominant and autosomal or dominant and X linked

X-Linked Dominant features:-

1. Both males and females are affected; often more
   
2. Females than males are affected
   
3. Does not skip generations.
4. Affected sons must have an affected mother.
5. Affected daughters must have either an affected mother or an affected father.
6. Affected fathers will pass the trait on to all their daughters.

So, the correct option is 'Dominant and X linked'.