OOGENESIS

Question 1

Oogenesis

Answer 1

Process of formation of female gamete

Question 2

Initiation stage

Answer 2

Initiated during embryonic development

Question 3

Oogonia

Answer 3

Gamete mother cell

Question 4

Prophase 1

Answer 4

• Meiotic division
• cells start to divide
• Temporarily arrested
• Called primary oocyte

Question 5

Primary follicle

Answer 5

• Primary oocyte surrounded by granulosa layer
• Large no. degenerate during phase frombirth to puberty
• Only 60k to 80k left in each ovary

Question 6

Secondary follicle

Answer 6

Primary follicles further surround by layers of granulosa cells and new theca called secondary follicle

Question 7

Tertiary follicle

Answer 7

• Secondary follicle further gives tertiary follicle

- Characterised by a fluid filled cavity called antrum

Question 8

Theca layer

Answer 8

-Organised into inner theca(interna) and outer theca(Externa)

Question 9

Simeltaneously primary oocyte

Answer 9

-Within tertiary follicle grows in size and co mpletes first Meiosis

Question 10

Meiosis

Answer 10

• Haploid secondary oocyte

- polar body

Question 11

Secondary oocyte

Answer 11

-Retains bulk of nutrient rich cytoplasm of primary oocyte

Question 12

Graffian follicle

Answer 12

Tertiary follicle changes into mature graffian follicle

after zona is formed it ruptures to give out sec.

Question 13

Zona pellucida

Answer 13

Sec. oocyte forms a new membrane around it