The data confirm that black fur and black eyes are because even though one of the parents was homozygous for both white fur and red eyes, offspring had black fur and black eyes.

Black fur and black eyes must be dominant traits. A parent homozygous for white fur and red eyes would pass on only the alleles for those traits, yet the offspring showed black fur and black eyes. The black-trait alleles can mask the white-fur and red-eye alleles, which is what dominant alleles do.

AI-written and checked against the verified answer.