"The mischievous culprit is a gene mutation discovered accidentally around 70 years ago, and quickly latched onto by tomato breeders; in fact, now the mutation has been deliberately bred into nearly all modern tomatoes. Why? It makes them a uniform and seductive deep scarlet red when ripe. Unfortunately for tomato-lovers, as reported in a paper published in the journal, Science, the red-making mutation deactivates an important gene responsible for producing the sugar and aromas that are essential for a fragrant and flavorful tomato." - klemo from Bookmarklet