1- Morphogens are
subtances that elicit multiple responses at the same concentration levels in a given tissue
determinants of the dorso-ventral body axes
substances that specify cell identity as a function of its concentration
localized to the dorsal surface of the early embryo

2- Localized signal produced by follicular cells at the ventral surface of the drosophila egg results in induction of
dorsal
bicoid
ddp
follicular transcription factor

3- Concentration is highest in the ventral area and lowest in the dorsal area of the drosophila embryo
dorsal
bicoid
dpp
twist

4- Localized at the anterior end of the embryo
dorsal
bicoid
dpp
twist

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Answers:

1- Morphogens are
Answer: substances that specify cell identity as a function of its concentration

2- Localized signal produced by follicular cells at the ventral surface of the drosophila egg results in induction of
Answer: dorsal

3- Concentration is highest in the ventral area and lowest in the dorsal area of the drosophila embryo
Answer: dorsal

4- Localized at the anterior end of the embryo
Answer: bicoid