Gastrulation

Question 1

who is Hilde Mangold

Answer 1

the pHD student who carried out the organiser transplant experiment

Question 2

How does the organiser form

Question 3

what is a ventral furrow

Answer 3

the ridge that forms along the ventral side of blastula during gastrulation.
It is formed by the movement of cells into the blastocyst

Question 4

what is epiblast

Answer 4

primitive ectoderm that is able to undergo gastrulation and become 3 germ layers.

Question 5

what is morphogenesis

Answer 5

a series of cell shaping movements that bring about 3 germ layers

Question 6

in what direction does the primitive streak travel in chicken embryos

Answer 6

from anterior to posterior. Cells that gastrulate early are closer to the head whilst those the move later end up closer to the tail end.

Question 7

why do cells change position as the embryo develops during gastrulation

Answer 7

The germ layers will eventually fold together to complete the gut canal.
cells that are medial will them become dorsal
cells that are lateral will then become ventral