Question

Two dogs have different parents. One dog has blue eyes, and the other dog has brown eyes. Why do the dogs have different eye colors? a Each dog has a different eye color because offspring from different parents will have different eye colors. Each dog has a different eye color because offspring from different parents will have different eye colors. b Each dog has a different eye color because they have different versions of the gene for eye color that connect together to make different eye colors. Each dog has a different eye color because they have different versions of the gene for eye color that connect together to make different eye colors. c The dogs have different versions of the gene for eye color, which instruct for different proteins that connect in different ways to make different eye colors. The dogs have different versions of the gene for eye color, which instruct for different proteins that connect in different ways to make different eye colors. d The dogs have different versions of the gene for eye color. The genes are different colors for each dog’s eyes. The dogs have different versions of the gene for eye color. The genes are different colors for each dog’s eyes.

Answer 1

Heterochromia is caused by a lack of the pigment melanin in all or part of one eye. In dogs with heterochromia, the lack of melanin causes one of their eyes to appear blue or bluish-white. Heterochromia in dogs is often hereditary, meaning it is passed through their genetic makeup.

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