Oogenesis is the formation of a mature female gamete or ovum. Meiosis I occurs in the primary oocyte and gets arrested at the prophase I... View Article
Polar bodies are formed at the time of oogenesis. They contain very little cytoplasm so they usually degenerate. The egg cell gets the most of... View Article
In humans, meiosis 2 occurs in the secondary oocytes or spermatocytes leading to the formation of ootid or spermatid, respectively, which are... View Article
Corpus luteum is formed after ovulation. The ruptured Graafian follicle transforms into the corpus luteum. The Corpus luteum is important to... View Article
Spermatogenesis is controlled by various hormones. LH induces the synthesis and secretion of androgens from the Leydig cells. FSH and androgens... View Article
The secondary oocyte is produced by meiosis I in the primary oocyte. It starts the second meiotic division immediately but gets arrested at... View Article
No, primary oocytes are diploid cells. They are produced by mitotic division in oogonia. Meiosis I occurs in the primary oocytes leading to the... View Article
Yes, a gamete possesses a haploid nucleus in a diploid organism. Sperm and ovum both contain a haploid nucleus. Gametes are formed by meiosis in... View Article
Acrosome is present at the anterior end of the elongated nucleus, present in the sperm head as the cap-like structure. It is derived from the... View Article
Polar bodies fragment and degenerate. Polar bodies are formed by unequal cytoplasmic division at the time of meiosis in oocytes. They are tiny... View Article
Spermatids are haploid cells formed after meiosis in the spermatocytes. Spermatids transform into sperms by the process of spermiogenesis.... View Article
The release of a secondary oocyte by the ovary is called ovulation. LH surge induces rupture of the Graafian follicle and releases a secondary... View Article
The first polar body is formed by the first meiotic division in primary oocytes. The primary oocyte produces a larger secondary oocyte and the... View Article
After fertilisation, the zygote starts dividing by mitosis. Morula is the solid ball of cells consisting of 8-16 blastomeres. Then it further... View Article
Spermatid is the haploid cell, which is formed by the meiosis in spermatocytes. Spermatids mature and develop into spermatozoa or sperms by the... View Article
No, oocytes undergo meiosis to produce ovum. After the first meiotic division in primary oocytes, secondary oocytes are formed. Secondary oocytes... View Article
Sperms released in the vaginal region after insemination, quickly move towards the uterus through the cervix and reach the ampullary region of... View Article
Polar bodies are the tiny haploid cells produced during oogenesis. They are produced due to unequal cytoplasmic division in the primary and... View Article
Secretion of luteinizing hormone (LH) increases gradually during the follicular phase of the menstrual cycle. It reaches the maximum level (LH... View Article
