Cleavage and Gastrulation Flashcards Preview

Developmental Biology > Cleavage and Gastrulation > Flashcards

Flashcards in Cleavage and Gastrulation Deck (13)
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1
Q

What protein is associated with the different steps of the cell cycle?

A

Cyclin

2
Q

What is division of genetic material?

A

karyokinesis

3
Q

What is the division of cellular material

A

cytokinesis

4
Q

What are the two main types of cleavage?

A

Holoblastic (complete) and Meroblastic (incomplete) cleavage

5
Q

What are the two types of yolk distribution in holoblastic cleavage?

A

Isolecithal (sparce evenly distributed yolk)

Mesolecithal (moderate yolk distribution)

6
Q

What are the two types of yolk distribution in meroblastic cleavage?

A
  1. Telolecithal
    (Dense yolk throughout most of cell0
  2. Centrolecithal (Yolk in center of egg)
7
Q

What factors affect cleavage pattern?

A
  1. yolk density

2. mitotic spindle position

8
Q

Define blastula

A

Hollow ball of cells

9
Q

Define blastocoel

A

inside of blastula/gastrula

10
Q

Define gastrula

A

Blastula that has undergone gastrulation, now has three layers.

11
Q

What does the midsagital plane divide?

A

Left from right

12
Q

What does the transverse plane divide?

A

anterior from posterior

13
Q

What does the horizontal plane divide

A

dorsal from ventral