Cleavage And Morula

Question 1

The daughter cells formed during each mitotic division are therefore what in size than their predecessors

Answer 1

Smaller in size

Question 2

What is the goal of the first phase of development (2 main things)

Answer 2

Produce small cells with a high surface to volume ratio, this enhances uptake of nutrients and disposal of wastes. Provides large number of buildings blocks to construct embryo

Question 3

First cleavage division of zygote produces what

Answer 3

Blastomeres, 2 identical cell divisions

Question 4

Following cleavage, the 16 cell structure is known as

Answer 4

Morula

Question 5

What is compaction

Answer 5

The smoothening of the surface of morula

Question 6

What exactly happens during compaction

Answer 6

Boundaries between adjacent cells become less obvious and more adhesive

Question 7

First 4 cell divisions that take place following fertilisation occur without any what to the developing embryos

Answer 7

Increase to overall size