It has always been known that children are not fond of vegetables, especially broccoli. Broccoli is part of a group named the Brassica group. Other than broccoli, the Brassica group also contains cauliflower, cabbage and Brussels sprouts. These specific vegetables contain a compound called S-methyl-ʟ-cysteine sulfoxide, which can cause bacteria in the mouth if mixed with a certain type of saliva. This compound was tested with saliva samples from parent and children's pairs, with the children between ages 6 and 8 years old. When these samples were tested, it turned out that both the parents, and their children shared similar samples of saliva. The children with a high amount of sulfur volatiles hated the Brassica vegetables, but the parents with a similar sample did not have the same reaction to the vegetables, as they did not find the taste as bad as their children did. This could be because the parents got used to the taste of Brassica vegetables over the years and can now tolerate the taste. These findings strongly indicate that the dislike of broccoli in children is passed down from their parents through genetics due to the fact that saliva with a high amount of sulfur volatiles is passed down, and that causes the taste of broccoli to be disliked.
Tastes and eat habits are both controlled by genes according to researchers. Taste receptors on the tongue are another genetically inherited reason to believe that a kid's hatred for broccoli is due to genes. Different people from different continents and populations also differ in their taste by being able to taste, or not taste certain things. This shows that with a little evolution for different areas and genetics from ancestors in that region, taste genes can be different and affected through genes.
Genes can be partially blamed for kid's aversion to broccoli and other Brassica Vegetables.