(General) Principles of Development

Question 1

Infolding of cell sheet into embryo

Answer 1

Invagination

Question 2

Inturning of cell sheet over the basal surface of an outer layer

Answer 2

Involution

Question 3

Migration of individual cells into the embryo

Answer 3

Ingression

Question 4

Splitting of one sheet into two sheets

Answer 4

Delamination

Question 5

Expansion of one cell sheet over other cells

Answer 5

Epiboly

Question 6

Contact and recognition between sperm and egg

Answer 6

Fertilization

Question 7

Mitosis without size increase

Answer 7

Cleavage

Question 8

Ending of cleavage

Answer 8

Formation of blastoderm

Question 9

Complete cleavage

Answer 9

Holoblastic

Question 10

Incomplete cleavage

Answer 10

Meroblastic

Question 11

Formation of three-layered organism in its proper orientation

Answer 11

Gastrulation

Question 12

Five examples of gastrulation movements

Answer 12

Invagination, involution, ingression, delamination, epiboly,

Question 13

Three derivatives of somites

Answer 13

Myotome, sclerotome, dermatome

Question 14

Germ layer origin of notochord

Answer 14

Mesoderm

Question 15

Germ layer origin of somites

Answer 15

Mesoderm

Question 16

Germ layer origin of embryonic gut

Answer 16

Endoderm

Question 17

Germ layer origin of epidermis

Answer 17

Ectoderm

Question 18

Germ layer origin of brain

Answer 18

Ectoderm

Question 19

Germ layer origin of liver

Answer 19

Endoderm

Question 20

The formation of the ______ characterizes gastrulation in Dm

Answer 20

Ventral furrow

Question 21

Reason why hen only has one functional ovary

Answer 21

Need ample space for egg to develop

Question 22

Can a hen lay more than one egg per day?

Answer 22

Yes

Question 23

Where does the sperm enter the chick egg to fertilize it?

Answer 23

Anywhere

Question 24

Meaning of macrolecithal

Answer 24

Large yolk

Question 25

Outermost layer of egg shell

Answer 25

Cuticular layer

Question 26

Only egg shell layer that is not made of calcium carbonate

Answer 26

Cuticular layer

Question 27

Middle layer of egg shell

Answer 27

Spongy layer

Question 28

Composition of spongy and mammillary layers

Answer 28

Calcium carbonate

Question 29

End of the egg with most pores

Answer 29

Blunt end

Question 30

Which of the two (inner/outer cell membrane) is made of thin elastin-like fibers of uniform thickness?

Answer 30

Inner layer

Question 31

Which of the two (inner/outer cell membrane) is made of thick elastin-like fibers of non-uniform thickness?

Answer 31

Outer layer

Question 32

Antibacterials in albumen

Answer 32

Lysozyme, ovotransferrin, avidin

Question 33

Antivirals in albumen

Answer 33

Ovomucin, cystatin

Question 34

Function of avidin

Answer 34

Binds to biotin

Question 35

Disease caused by eating too many raw egg

Answer 35

Egg white disease

Question 36

Living component of egg that contains viable embryo

Answer 36

Germinal disc

Question 37

Difference between blastodisc and blastoderm

Answer 37

Blastoderm - fertile; blastodisc - infertile

Question 38

Blastoderm indicates ____ egg?

Answer 38

Fertile

Question 39

Blastodisc indicates ____ egg?

Answer 39

Infertile

Question 40

What stage of development is a chick egg in once it is laid?

Answer 40

Gastrulation

Question 41

Description of chick cleavage

Answer 41

Meroblastic discoidal

Question 42

Cells produced during cleavage

Answer 42

Blastomeres

Question 43

Two layers formed at the end of cleavage

Answer 43

Epiblast, Hypoblast

Question 44

Layer of blastoderm that makes embryo

Answer 44

Epiblast

Question 45

Layer of blastoderm that makes extraembryonic structures

Answer 45

Hypoblast

Question 46

Space in center of blastoderm that separates cells from yolk

Answer 46

Subgerminal cavity

Question 47

Function of subgerminal cavity

Answer 47

Separates cells from yolk

Question 48

Characterizes chick gastrulation

Answer 48

Hensen's node @ primitive streak

Question 49

Type of fertilization in mouse

Answer 49

Internal

Question 50

Stage of meiosis at which the mouse egg cell is in, once it gets fertilized?

Answer 50

Meiosis II

Question 51

Does physiological polyspermy occur in mice?

Answer 51

No

Question 52

The two layers of blastocyst formed during mouse cleavage

Answer 52

Inner cell mass, trophectoderm

Question 53

Fate of trophectoderm

Answer 53

Extraembryonic structures

Question 54

Fate of inner cell mass

Answer 54

Mouse embryo