When do neutral mutations occur?

2 answers

Neutral mutations occur when a change in the DNA sequence of an organism has no effect on the fitness or survival of the organism. These mutations typically occur in non-coding regions of the genome or in genes where the change does not result in a change in the protein product. Neutral mutations can arise spontaneously during DNA replication or can be caused by external factors such as radiation or chemicals.
Three plants are grown in the same environmental conditions with equal sunlight, water, and space to grow. One plant grew to have a purple flower while the other two grew white flowers. What is the most likely conclusion that can be made for the change in flower color?