Final answer:
The two dogs have different eye colors due to different combinations of genetic alleles inherited from each set of parents. Dogs have a genetic pattern for eye color just as they do for fur color, and this is also comparable to complex genetic inheritance in humans. Dogs have a unique color perception compared to humans, being unable to distinguish red and green.
Step-by-step explanation:
The eye color difference in the two dogs with different parents can be attributed to the concept of genetics and inheritance patterns. Just like in humans, several genes are involved in determining the eye color of dogs. The parents of each dog likely carried distinct combinations of alleles that resulted in the expression of different eye colors - blue and brown. In the case of Labrador retrievers, for example, the presence of certain alleles determines fur color, which is an analogy for how different alleles can determine eye color. A similar complex inheritance pattern is seen in humans where the dominant brown allele will express brown eyes, while the recessive blue allele will express blue eyes unless two copies are inherited.
Dogs perceive color differently compared to humans. They have two kinds of cone cells and can see blue and yellow; however, they are red-green color blind. Due to this different perception, a dog would have a hard time distinguishing a red bird in green grass.