TLS Online TPP Program

#Question id: 7091


The development of the antero-posterior axis of Drosophila is initiated when:

#Unit 5. Developmental Biology
  1. the mother packages bicoid and nanos mRNA into the developing oocyte
  2. the Toll receptor is activated after fertilization, leading to nuclear localization of Dorsal protein
  3. the terminal group protein Torso sets up the anterior and posterior poles of the embryo
  4. the sperm enters the micropile at the anterior end, thus specifying the antero-posterior axis