representative gastrulation pattern ( Mesolecithal egg) - frog

Question 1

what representative organism has mesolecithal egg?

Answer 1

Frog

Question 2

what is the first indication of gastrulation in mesolecithal egg?

Answer 2

indentation in between the animal and vegetal pole

Question 3

what is the importance of indentation in between the animal and vegetal pole?

Answer 3

it is very important because this cell start gastrulation and begin to form the dorsal lip

Question 4

it refers to the more rapid movement towards the opposite side
- it creates the archenteron or the primitive gut
- it creates an antero-posterior axis and ventral/dorsal

Answer 4

midgastrula

Question 5

this side is the blastopore lip
-cells migrating towards the interior sort of feel around: fibronectin

Answer 5

posterior

Question 6

in the process of making archenteron, _________ is displaced in the ventral side

Answer 6

blastopore lip

Question 7

during midgastrula, cells forming the primitive gut cause the lengthening of the shape of the embryo called the ________

Answer 7

Chordamesoderm

Question 8

in the formation of the chordamesoderm, ______ and ________ extend to the ventral

Answer 8

dorsal lip, lateral lip

Question 9

true or false
in the formation of chordamesoderm, dorsal, ventral and lateral lip form a square

Answer 9

form a circle

Question 10

during midgastrula, why are there more darker parts in some and not in others?

Answer 10

because of epibolic movement

Question 11

this movement, not only are the cells involuting, animal pole cells are undergoing epiboly to cover the vegetal pole cells

Answer 11

Epibolic movement

Question 12

it includes the convergent extension in chordamesoderm

Answer 12

Epibolic movement

Question 13

in this stage, archenteron is very prominent and
blastocoel disappears

Answer 13

late gastrula

Question 14

During late gastrula, _________ - shaped cells are predetermined to sink in and invaginate inside

Answer 14

bottle