The genotype of an animal is its genetic coding for traits, and its phenotype is the physical expression of those traits. Phenotypes can include the way a shark looks or its physiology. Most traits are either dominant or recessive. If a shark has a recessive and dominant gene for a trait, than the dominant gene will be expressed physically in the shark. If a shark receives all recessive genes, then the recessive type will be expressed. Illnesses and unique colors can be expressed in recessive genes, but are commonly masked by dominant genes. Mutations can occur in a shark’s genotype, which can either positivey or negatively impact the phenotype of a shark and its ability to survive.
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