Ch9 - Gap Genes Flashcards Preview

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Flashcards in Ch9 - Gap Genes Deck (7)
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1

Hunchback forms

a gradient high to low

2

Transcription of anterior gap genes is initiated by

different concentrations of hunchback and bicoid genes
• high hunchback - express giant, prevent transcription of posterior gap genes
• hunchback concentration declines - Kruppel

3

Gradient of ... activates abdominal genes

caudal
• high at posterior

4

Gap gene activation

anterior = hunchback --> kruppel
posterior = caudal (abdominal)

5

The expression of gap genes is maintained by

interactions between different gap gene products

6

Boundaries of gap gene transcription

by mutual repression

7

All 4 major gap genes encode

DNA binding proteins that activate/repress the transcription of other gap genes