In a Fruit Fly Embryo,a Homeotic Gene Antp Determines Where

Multiple Choice

In a fruit fly embryo,a homeotic gene Antp determines where legs grow.When the promoter of Antp is mutated,a fly ends up with legs growing out of its head in place of antennae.In this mutation,

A) Antp must be turned off in all of the fly cells.
B) The Antp gene, and its transcription factor, and enhancer sequence are turned on in the head.
C) antennae grow where the legs would normally be found.
D) Antp must be turned on in the head.
E) the Antp enhancer sequence, or transcription factor is not functional.