Evolutionary Insights
Visualizing gene expression can also give important insights into evolution. Watch this animation of a pigmentation gene in action:
Animation: The “Paintbrush” Gene
One difference between these two species is the presence of a wing spot in Drosophila biarmipes.
This picture of the expression of the yellow gene (indicated in white) shows activity at the precise location of the wing spot.
Evolution has altered gene expression to create this pattern.
