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MBB 142 postlab > (General) Principles of Development > Flashcards

(General) Principles of Development Flashcards

1
Q

Infolding of cell sheet into embryo

A

Invagination

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2
Q

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

A

Involution

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3
Q

Migration of individual cells into the embryo

A

Ingression

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4
Q

Splitting of one sheet into two sheets

A

Delamination

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5
Q

Expansion of one cell sheet over other cells

A

Epiboly

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6
Q

Contact and recognition between sperm and egg

A

Fertilization

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7
Q

Mitosis without size increase

A

Cleavage

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8
Q

Ending of cleavage

A

Formation of blastoderm

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9
Q

Complete cleavage

A

Holoblastic

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10
Q

Incomplete cleavage

A

Meroblastic

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11
Q

Formation of three-layered organism in its proper orientation

A

Gastrulation

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12
Q

Five examples of gastrulation movements

A

Invagination, involution, ingression, delamination, epiboly,

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13
Q

Three derivatives of somites

A

Myotome, sclerotome, dermatome

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14
Q

Germ layer origin of notochord

A

Mesoderm

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15
Q

Germ layer origin of somites

A

Mesoderm

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16
Q

Germ layer origin of embryonic gut

A

Endoderm

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17
Q

Germ layer origin of epidermis

A

Ectoderm

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18
Q

Germ layer origin of brain

A

Ectoderm

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19
Q

Germ layer origin of liver

A

Endoderm

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20
Q

The formation of the ______ characterizes gastrulation in Dm

A

Ventral furrow

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21
Q

Reason why hen only has one functional ovary

A

Need ample space for egg to develop

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22
Q

Can a hen lay more than one egg per day?

A

Yes

23
Q

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

A

Anywhere

24
Q

Meaning of macrolecithal

A

Large yolk

25
Q

Outermost layer of egg shell

A

Cuticular layer

26
Q

Only egg shell layer that is not made of calcium carbonate

A

Cuticular layer

27
Q

Middle layer of egg shell

A

Spongy layer

28
Q

Composition of spongy and mammillary layers

A

Calcium carbonate

29
Q

End of the egg with most pores

A

Blunt end

30
Q

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

A

Inner layer

31
Q

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

A

Outer layer

32
Q

Antibacterials in albumen

A

Lysozyme, ovotransferrin, avidin

33
Q

Antivirals in albumen

A

Ovomucin, cystatin

34
Q

Function of avidin

A

Binds to biotin

35
Q

Disease caused by eating too many raw egg

A

Egg white disease

36
Q

Living component of egg that contains viable embryo

A

Germinal disc

37
Q

Difference between blastodisc and blastoderm

A

Blastoderm - fertile; blastodisc - infertile

38
Q

Blastoderm indicates ____ egg?

A

Fertile

39
Q

Blastodisc indicates ____ egg?

A

Infertile

40
Q

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

A

Gastrulation

41
Q

Description of chick cleavage

A

Meroblastic discoidal

42
Q

Cells produced during cleavage

A

Blastomeres

43
Q

Two layers formed at the end of cleavage

A

Epiblast, Hypoblast

44
Q

Layer of blastoderm that makes embryo

A

Epiblast

45
Q

Layer of blastoderm that makes extraembryonic structures

A

Hypoblast

46
Q

Space in center of blastoderm that separates cells from yolk

A

Subgerminal cavity

47
Q

Function of subgerminal cavity

A

Separates cells from yolk

48
Q

Characterizes chick gastrulation

A

Hensen’s node @ primitive streak

49
Q

Type of fertilization in mouse

A

Internal

50
Q

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

A

Meiosis II

51
Q

Does physiological polyspermy occur in mice?

A

No

52
Q

The two layers of blastocyst formed during mouse cleavage

A

Inner cell mass, trophectoderm

53
Q

Fate of trophectoderm

A

Extraembryonic structures

54
Q

Fate of inner cell mass

A

Mouse embryo

MBB 142 postlab (1 decks)

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