Question

In order for fertilization to occur, we need haploid spermatozoa's and a haploid ovum. Describe (in at least 150 words) gametogenesis in both male and female systems and how oogenesis is coordinated with the menstrual cycle.

Answer 1

spermatogenesis occur inside the testis .

3 phases are there

1} fromation of spermatogonia

2} germ cell proliferation

3}spermiogenesis.

The first phase - foramation of primary spermatocytes.

second phage - formation of second  spermatocytes.from into speramtid

third phage - spermatid to sperm formation .

PRIMORDIAL CELL-------> 2 SPERMATOGONIA ---------.> BY MITOSIS PRIMARY SPERMATOCYTE (N)

------> BY MEIOSIS SECONDARY SPERMATOCYTE(N)---------->SPERMATID (N)---------> SPERM (N)

OOGENSIS :- DIFFERS FROM SPERMATOGNESIS IN 3 RESPECT :-

1)mitosis in female takes place before birth entirly

2}meiotic devision produce only one ovum , while in male produce 4 sperm

3}secondary meiotic devision complete only after fertilization , while in male meiotic products substatialy undergo differntiation to sperm .

relaese of ovum from ovary under LH harmone only after Lh surge ovum is relaesed into abdominal cavity of women .

mestrual cycle mid mentrual days LH surge occur after that ovum ready for fetilization upto 24 hr .