BW: Pedigrees

The trait is X-linked and dominant.

The trait is Y-linked and dominant.

The trait is autosomal and dominant.

The trait is X-linked and recessive.

Both parents are heterozygous for the black-fur trait.

One parent is heterozygous and one is homozygous for fur color.

The offspring with brown fur has a mutant gene for fur color.

Both parents are homozygous for the black-fur trait.