The study revealed that pickiness was more similar in identical twins, who share 100 percent of their genes, than in non-identical twins, pointing to genetics as a key factor.
While nature does take a majority of the blame here, nurture still has some say in the matter. Environmental factors like whether families sat down for dinner explained 15 to 26 percent of differences in pickiness.
The researchers looked into the causes of childhood food fussiness and found that genetics explained up to 86 percent of the differences in picky behavior among children.
This environmental factor is important, indicating that food fussiness isn't as hopeless as it may seem and that room for intervention exists in the toddler phase.
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