Branching of the Drosophila Tracheal System Involves Three Genes,Branchless,Breathless,and Sprouty,and

question 7

Multiple Choice

Branching of the Drosophila tracheal system involves three genes,Branchless,Breathless,and Sprouty,and orthologs of these genes play similar roles in vertebrate lung development.What would be the expected outcome if Sprouty is inactivated during Drosophila development?

• A) The tracheal system fails to form.
• B) Extra branching of the tracheal system occurs.
• C) Less branching of the tracheal system occurs.
• D) The tracheal system is converted into a nervous system.
• E) The tracheal system is converted into muscle.