The process of oogenesis takes…….to complete.
a) days
b) weeks
c) months
d) years
Explanation from before birth to the period of conception of sperm
Which of the following are the diploid stem cells of the ovaries in the fetal period?
a) oogonia
b) primary oocytes
c) ova
d) secondary oocytes
Explanation oogonia (diploid cells 2N) multiply rapidly by mitosis and then enter a growth phase and lay in nutrient reserves.
Gradually oogonia transform into……..
a) polar body
b) primary oocytes
c) ova or eggs
d) secondary oocytes
Explanation primary oocytes are surrounded by a single layer of follicle cells
Which of the following start first meiotic-I division during oogenesis in female reproductive cycle?
a) polar body
b) primary oocytes
c) ova or eggs
d) secondary oocytes
Explanation primary oocytes are diploid cells (2N)
The meiotic-I division stalled late in…… and do not complete during oogenesis.
a) prophase-I
b) metaphase-I
c) anaphase-I
d) telophase-I
Explanation Oocytes are arrested at the first meiotic prophase, held in meiotic arrest by the surrounding follicle cells until a surge of LH from the pituitary stimulates the immature oocyte to resume meiosis.
Primary oocytes remain in their state of suspended animation all through the childhood; the wait is long one……….. years at the very least.
a) 2-4
b) 3-6
c) 4-8
d) 10-14
Explanation this is the period of puberty in female girl, and she has her first menstrual cycle
