Final answer:
The statement is false; mutations in gametes do act as an evolutionary force and can disrupt Hardy-Weinberg equilibrium by changing allele frequencies.
Step-by-step explanation:
Mutations in gametes do contribute to evolutionary processes by introducing new genetic variations into a population. However, the statement 'Mutation only in gamete phase, is an evolutionary force, does not cause HW disequilibrium' is false. According to the Hardy-Weinberg principle, five factors can disrupt the equilibrium of a population's allele frequencies: natural selection, mutation, genetic drift, gene flow (migration), and nonrandom mating. A mutation in the gamete can alter allele frequencies, contributing to the evolutionary change and potentially causing a Hardy-Weinberg disequilibrium if the mutation affects the reproductive success of the carriers.