Genetic mutations can significantly impact the phenotype of an organism by altering its physical and functional traits. These changes can be beneficial, neutral, or harmful, influencing the organism's ability to survive and reproduce in its environment. For example, a mutation that provides improved camouflage may enhance survival against predators, while a harmful mutation could lead to diseases. Some mutations may also affect metabolic processes, impacting growth and development. Overall, mutations contribute to genetic diversity, which is vital for evolution and adaptability within populations.