Indicate whether each of the following proteins is most concentrated near the dorsal (D) or ventral (V) side of the Drosophila embryo. Your answer would be a four-letter string composed of letters D and V only, e.g. DDDV.
( ) Decapentaplegic
( ) Dorsal (nuclear fraction)
( ) Toll (active form)
( ) Twist

Question

Indicate whether each of the following proteins is most concentrated near the dorsal (D) or ventral (V) side of the Drosophila embryo. Your answer would be a four-letter string composed of letters D and V only, e.g. DDDV.
( )	Decapentaplegic
( )	Dorsal (nuclear fraction)
( )	Toll (active form)
( )	Twist

Quizplus · Accepted Answer

Activated Toll receptors on the ventral side of the embryo result in the nuclear localization of Dorsal at this side. The highest nuclear Dorsal concentration activates the expression of Twist, whereas the lowest concentration de-represses Decapentaplegic (Dpp). At intermediate concentrations, Short gastrulation (Sog) expression is induced.

Indicate Whether Each of the Following Proteins Is Most Concentrated