The gene for fur color in this rabbit scenario appears to be an example of incomplete dominance. When a white-furred rabbit and a black-furred rabbit produce offspring that are all gray, it suggests that:

  • Neither the white nor the black allele is completely dominant.
  • The heterozygous genotype (one white allele, one black allele) produces a blended phenotype (gray), intermediate between the two parents.
  • This fits the classic definition of incomplete dominance, where the heterozygote shows an intermediate trait rather than fully expressing one parent’s trait or showing both distinctly (which would be codominance).