Ch9 - Pair-rule Genes

Question 1

The first sign of segmentation

Answer 1

pair-rule genes expressed in the 13th cell division

Question 2

Pair-rule genes are told to transcribe by

Answer 2

protein products of gap genes

Question 3

Primary pair-rule genes

Answer 3

essential for formation of the periodic pattern

• directly controlled by gap gene proteins

Question 4

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

Answer 4

gap gene proteins

Question 5

Enhancers of primary pair-rule genes are

Answer 5

modular

Question 6

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

Answer 6

interactions among themselves

primary pair-rule genes

Question 7

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

Answer 7

expression of secondary pair-rule genes

Question 8

The expression of each pair rule genes is in

Answer 8

7 stripes

• divides embryo into 14 parasegments

Question 9

Pair-rule proteins activate the expression of

Answer 9

segment polarity genes