Genetic variants of the HMGA2 gene
controls beak size in the birds, evolutionary geneticist Leif Andersson and colleagues now report.
Andersson's group narrowed the search for the gene
controlling beak size to a stretch of DNA that contains HMGA2 and three other genes.
Not exact matches
In a previous study from the same team the ALX1 gene was revealed to
control beak shape (pointed or blunt) and now a gene (HMGA2) affecting
beak size has been identified.