Chapter 18.2 - Hierarchical Control Flashcards
1
Q
What is a blastoderm?
A
It a stage in drosophila devo where the nuclei become enclosed into its own cell membrane
2
Q
Explain the process of gastrulation
A
It is when the cells of the blastoderm migrate inward creating layers of cells within the embryo. It forms three germ layers that differentiate in to different types of cells
3
Q
What are the three germ layers that gastrulation forms
A
Endotherm, ectoderm and the mesoderm
4
Q
What is segementation?
A
it is the organization of the embryo into three parts
5
Q
How many cephalic segments are there
A
three (C1-C3)
6
Q
How many thoracic segments are there?
A
three (T1-T3)
7
Q
How many abdominal segments are there?
A
8, (A1-A8)
8
Q
What are Maternal effect genes
A
A gene that is expressed by the mother that affects the phenotype of the offspring
