Main Answer: An individual can inherit the "fish odor syndrome" trait even if their parents do not have it. Explanation 1: This is because the trait is caused by a recessive gene. If both parents carry one copy of the gene but do not have the condition themselves, they are considered carriers. If both parents pass on their copy of the gene to their child, the child can develop the condition. Explanation 2: It is also possible for the mutation to occur spontaneously in the child's DNA, without either parent carrying the gene. This is known as a de novo mutation and can happen in any individual, regardless of whether their parents have the trait.