10 oogonia yield 10 primary oocytes, then how many ova are produced on completion of oogenesis–

Oocyte is liberated from ovary under the influence of LH, after completing –

Solution

Oocyte is liberated from ovary under the influence of LH, after completing meiosis I and before liberating second polar bodies.

Which one is a primary sex organ?

Polar body is produced during the formation of –

Cleavage in the fertilized egg of humans:

All of the following occur during natural menopause EXCEPT

Solution

Menopause is the cessation of menstrual cycles. It is caused by the depletion of ovarian follicles that started before birth and continues throughout the reproductive life of the female. In the absence of follicular development,the decreased estrogen and progesterone levels in the blood do not inhibit the pituitary FSH and LH levels and the cycles stop. The FSH and LH levels, however, remain high in the post-menopause.

The LH surge from the anterior pituitary gland

Solution

The LH surge is a peak burst of LH from the anterior pituitary gland, which causes ovulation. It occurs in the middle of the ovarian cycle and is stimulated by the positive feedback of a high blood level of estrogen that is sustained for 48 to 50 hours. Although FSH and LH stimulate follicle development at the beginning of a cycle, it is the LH surge that results in the rupture of the dominant follicle from the ovary.

Which of the following statements about oogenesis is false ?

Solution

During oogenesis, the primary oocyte is diploid; after the first meiotic division into the secondary oocyte the cell becomes haploid.

Cowper’s glands are found in:

Cortical granules are associated with

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