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
Oogenesis starts during the embryonic stage. During gestation, primitive germ cells give rise to oogonia after mitosis. Primary oocytes are... View Article
The meiotic division during oogenesis is unequal. After 1st meiotic division, primary oocytes divide unequally resulting in the larger secondary... View Article
Zygote is formed by the fusion of male and female gametes. In humans, the zygote is diploid and contains 23 pairs of chromosomes, i.e. 46... View Article
Meiosis or reduction division occurs during gametogenesis in the formation of gametes (sperm and ova). Meiosis occurs in the testes and ovaries... View Article
The human sperm is composed of three main parts: head, middle piece and tail. The main function of the tail is to provide motility to the sperm.... View Article
Primary oocyte completes the first meiotic division in the tertiary follicle, giving rise to the bigger secondary oocyte and a tiny first polar... View Article
Testosterone is produced by the Leydig or interstitial cells present in the testes. These cells are present in the interstitial spaces outside... View Article
The secondary oocyte undergoes a second meiotic division and produces one haploid ovum and the second polar body. Therefore, one secondary oocyte... View Article
ATP synthase is the complex V of the electron transport chain. It catalyses the synthesis of ATP from ADP and Pi by oxidative phosphorylation.... View Article
Cytochromes are the electron carriers present in the electron transport chain. Cytochrome c acts as a mobile carrier and shuttles electrons... View Article
ATP synthase catalyses the synthesis of ATP from ADP and inorganic phosphate. The ATP synthesis is driven by the proton gradient and is coupled... View Article
