Gastrulation/Cleavage

Question 1

Cleavage consists of repeated

Answer 1

mitotic divisions of the
zygote,

Question 2

repeated mitotic divisions of the
zygote, resulting in

Answer 2

a rapid increase in the number of cells.

Question 3

the resulting cells from cleavage process are called

Answer 3

blastomeres

Question 4

Division of the zygote begins about

Answer 4

30 hours after
fertilization.

Question 5

These blastomeres become…….

Answer 5

with each cleavage
division since in the cleavage the cells divide.

Question 6

Cleavage occurs as the zygote passes along the….. to the ……

Answer 6

uterine tube to the uterus.

Question 7

Cell stage is called

Answer 7

morula

Question 8

morula

Answer 8

(it is 16 cells formed about 3
days after fertilization and enters the uterus).

Question 9

Internal cells of morula, inner cell mass, are surrounded by a layer of ……. that form the …….

Answer 9

cells, outer cell mass.

Question 10

Outer cell layer later give rise to….

Answer 10

trophoblast

Question 11

inner cell mass give rise to

Answer 11

embryo proper