Ch9 - Pair-rule Genes Flashcards Preview

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Flashcards in Ch9 - Pair-rule Genes Deck (9)
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1

The first sign of segmentation

pair-rule genes expressed in the 13th cell division

2

Pair-rule genes are told to transcribe by

protein products of gap genes

3

Primary pair-rule genes

essential for formation of the periodic pattern
• directly controlled by gap gene proteins

4

Different concentrations of ... say whether pair-rule genes are transcsribed or not

gap gene proteins

5

Enhancers of primary pair-rule genes are

modular

6

If pair-rule genes are initiated by gap gene proteins, the transcription pattern of primary pair-rule genes is stabilized by

interactions among themselves
(primary pair-rule genes)

7

Primary pair-rule genes form the context that allows/inhibits

expression of secondary pair-rule genes

8

The expression of each pair rule genes is in

7 stripes
• divides embryo into 14 parasegments

9

Pair-rule proteins activate the expression of

segment polarity genes