Gametogenesis1

Question 1

pre-embryonic period:
embryonic period:
fetal period:

Answer 1

0-2 weeks
3-8 weeks
9-birth

Question 2

Abnormal migration of PGC to

1) head and neck region
2) sacrococcygeal region

Answer 2

1) craniopharyngeal teratoma

2) sacrococcygeal teratoma

Question 3

Sacrococcygeal teratoma is due to:

Answer 3

1) abnomral migration of PGC

2) persistence of primitive streak

Question 4

Ability to form entire embryo and extra-embryonic tissue (upto 8 cell stage):

Answer 4

totipotent cell

Question 5

ability to form all germ layers:

Answer 5

pluripotent cells

eg: PGC

Question 6

Ability to form more than 1 category of cells:

Answer 6

multipotent cells

eg: hematopoietic cells

Question 7

Ability to form 1 category of cells:

Answer 7

oligopotent cells

eg: vascular stem cells

Question 8

forms only 1 type of cell:

Answer 8

unipotent cells

eg: liver cells

Question 9

Stages in prophase

Answer 9

leptotene, zygotene, pachytene, diplotene

Question 10

Corpus luteum persists for ___ days

Answer 10

14

Question 11

Corpus luteum shrinks _____ days prior to menstrual phase

Answer 11

3-4

Question 12

1 primary spermatocyte forms ___ spermatozoa

Answer 12

4

Question 13

1 spermatogonium forms ____ spermatozoa

Answer 13

64-512

Question 14

Spermatogenesis completes in ___ days

Answer 14

74 days> 64 days> 60 days

Question 15

LH surge occurs:

Answer 15

36 hours before ovulation

Question 16

LH peak occurs:

Answer 16

12 hours before ovulation

Question 17

most fertile period:

Answer 17

3 days ( 2 days before ovulation and 1 day after ovulation)

Question 18

In males meiosis occurs in:

Answer 18

seminiferous tubules

Question 19

Sperm maturation and motility occurs in:

Answer 19

epididymis

Question 20

Capacitation of sperms occurs in:

Answer 20

female genital tract

Question 21

conditioning of sperms lasts for

Answer 21

7 hours