L6

Question 1

What do morphogens need to be / have?

Answer 1

point source
diffuse
degrade

Question 2

a morphogen must diffuse ____ and degrade ____

Answer 2

slowly
quickly

Question 3

a morphogen is …

Answer 3

a molecule that defines two or more cell fates at different concentrations

Question 4

how can cells obtain positional information

Answer 4

serial signalling

Question 5

which three cells in caenorhabditis elegans make the vulva?

Answer 5

P5p, P6p, P7p

Question 6

which cells in c elegans become epidermis?

Answer 6

P3p, P4p, P8p

Question 7

development of primary and secondary vulval fates depends upon a signal from the _____

Answer 7

anchor cell

Question 8

_____ vulval precursor cells can respond to the anchor cell signal

Answer 8

all

Question 9

Lin-3 is a homologue of what kind of molec?

Answer 9

signalling

Question 10

the conc of ____ dictates the primary and secondary cell fates

Answer 10

Lin-3

Question 11

can you express Lin-3 anywhere?

Answer 11

yes so long as the larvae is hot

Question 12

if there is weak vs strong heat shock, what happens to lin-3

Answer 12

it becomes secondary + primary respectively

Question 13

invagination is driven by a contraction of ____

Answer 13

cortical actin

Question 14

the signal from the anchor cell is _____, which is detected by ____ on the vulva precursor cells

Answer 14

Lin-3

Let-23

Question 15

Lin-3 acts as a ______

Answer 15

morphogen

Question 16

Lin-3 signalling regulates ___ expression

Answer 16

lin-12

Question 17

in morphogenesis, daughter cells fuse to become ___ that join and make ____ of the rings

Answer 17

rings
tube

Question 18

invagination is driven by what

Answer 18

contraction of cortical actin

Question 19

intercalation drives _____ and _____ extension

Answer 19

epiboly
convergence