interactions between genetic and environmental factors determine direction of population lateralization
chao deng a1 a1 department of biomedical science, university of wollongong, wollongong, nsw 2522, australia
chao@uow.edu.au
Abstract
direction of the embyro's head rotation is determined by asymmetrical expression of several genes (such as shh, nodal,
lefty, and fgf8) in hensen's node. this genetically determined head-turning bias provides a base for light-aligned population lateralization in chicks, in which the direction of the lateralization is determined by genetic factors and the degree of the lateralization is determined by environmental factors.
