A small change in the DNA sequence can significantly influence body mass index.
The genetic change, called a single nucleotide polymorphism (SNP), replaced one nucleotide — the units that make up our DNA — with another. Researchers looked at a single change in the gene sequence in 170,000 people. On average, people with this gene variant weighed more.
This is the first step towards understanding how genes control variation in human traits.
Read more at The University of Queensland