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Embryology > Gametogenesis > Flashcards

Gametogenesis Flashcards

1
Q

Pre embryonic period

A

0-2 weeks

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2
Q

Embryonic period

A

3-8 weeks

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3
Q

Fetal period

A

9th week till birth

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4
Q

Primordial germ cells are produced by

A

Epiblast - 2nd week

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5
Q

Pluripotent cells forms

A

all germ layers

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6
Q

Gonads are formed by

A

Primordial germ cells from epiblast

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7
Q

Abnormal migration of primordial germ cells to head and neck region

A

Carnio - pharyngeal teratoma

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8
Q

Abnormal migration of PGC to sacrococcygeal region

A

Sacrococcygeal teratoma

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9
Q

Reasons for formation of sacrococcygeal teratoma

A

Abnormal migration of PGC to sacrococcygeal region and persistence of primitive streak

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10
Q

Ability to form entire embryo and extra embryonic tissue

A

Totipotent cell

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11
Q

Forms all Germ layers

A

Plueripotent cell

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12
Q

Ability to form more than one category of cell

A

Multipotent cell

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13
Q

Ability to form one category of cell

A

Oligopotent cell

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14
Q

Ability to form one type of cell

A

Unipotent cell

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15
Q

Order of potency of cells

A

Toti > Pluri > Multi > Oligo > Uni

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16
Q

Equational division

A

Mitosis

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17
Q

Reduction division

A

Meiosis

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18
Q

Mitosis occurs in

A

Body cells

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19
Q

Meiosis occurs in

A

Germ cells

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20
Q

Crossing over does not take place in

A

Mitosis

21
Q

Crossing Over takes place in

A

Meiosis

22
Q

Daughter cells resemble parent in which type of division

A

Mitosis

23
Q

Daughter cell does not resemble parents cell in

A

Meiosis

24
Q

Phases of Meiosis

A

Prophase, Metaphase, Telophase, Anaphase - P-MAT

25
Q

Stages in prophase

A

Leptotene, Zygotene, Pachytene, Diplotene.

26
Q

Resting phase of Prophase -

A

Diplotene

27
Q

Unequal division of cytoplasm is seen in

A

Oogenesis - Meiosis 1

28
Q

A cell without cytoplasm

A

Polar body

29
Q

Meiosis 2 is arrested in

A

Metaphase

30
Q

Meiosis 1 is arrested in

A

Prophase - Diplotene stage

31
Q

Corpus luteum persists for

A

12-14 days

32
Q

Shrunken Corpus luteum is called

A

Corpus albicans

33
Q

Polar bodies are not formed in

A

Males - spermatogenesis

34
Q

Polar bodies are formed in which division

A

Meiosis 1 and 2

35
Q

Spermiogenesis

A

Rearrangement of organelles - formation of tail, acrosomal cap, Shedding of Excess cytoplasm

36
Q

Rearrangement of organelles of Spermatid - formation of tail, acrosomal cap, Shedding of Excess cytoplasm

A

Spermiogenesis

37
Q

Spermatid to spermatozoa is called as

A

Spermiogenesis

38
Q

one primary spermatocyte forms

A

4 spermatids

39
Q

One Spermatogonium forms how many Spermatozoa

A

64-512

40
Q

Time taken for spermatogenesis to complete

A

74 days

41
Q

IN males meiosis occurs in

A

Seminiferous tubules

42
Q

Sperm maturation and motility is attained in

A

Epididymis

43
Q

Capacitation of sperms occurs in

A

Female genital tract

44
Q

Conditioning of sperms is called as

A

Capacitation.

45
Q

Totipotent cell - example

A

Zygote

46
Q

Pluripotent cell - Example

A

PGC

47
Q

Multipotent cell - Example

A

HSC, NSC, MSC.

48
Q

Oligopotent cell - Example

A

Vascular stem cell

Embryology (16 decks)

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