tal¹ mutants exhibit leg defects in which the tarsal segments do not develop.

In tal¹ mutant leg imaginal discs the whole tarsal region is missing. The tarsal fold does not form further than a superficial constriction, subsequent tarsal folds do not form, and the tarsal region does not grow.

In tal¹ mutant third instar leg imaginal discs, the original tarsal constriction forms as in the wild-type, but the tarsal fold never forms anything further than a superficial constriction, and subsequent tarsal fold do not form, with the tarsal region does not grow.

pri¹ mutants exhibit leg defects in which the tarsal segments do not develop.

In pri¹ mutant leg imaginal discs the whole tarsal region is missing. The tarsal fold does not form further than a superficial constriction, subsequent tarsal folds do not form, and the tarsal region does not grow.

In pri¹ mutant third instar leg imaginal discs, the original tarsal constriction forms as in the wild-type, but the tarsal fold never forms anything further than a superficial constriction, and subsequent tarsal fold do not form, with the tarsal region does not grow.