The tail of the sperm is responsible for its motility. The whipping back and forth movement of the tail propels the sperm in the female... View Article
The development and maturation of ovarian follicles is called folliculogenesis. The small primordial follicles develop and mature into large... View Article
The secondary spermatocyte gives rise to spermatid after meiosis II. Both the secondary spermatocyte and spermatid are haploid but the secondary... View Article
Zona pellucida is a glycoprotein layer present outside the plasma membrane of the oocyte. It regulates the interaction between egg and sperms and... View Article
The attachment of the blastocyst to the endometrium of the uterus is called implantation. The normal site of implantation is the dorsal wall of... View Article
A sperm cell is haploid and contains 23 chromosomes in humans. It is formed after meiosis in primary spermatocytes. Also Check: At What Age... View Article
Another term for the mature follicle is the Graafian follicle. They are named after Regnier de Graaf to honour his work in reproductive biology.... View Article
After fertilisation, the zygote starts dividing and produces 2, 4, 8, 16 daughter cells after subsequent cleavage. The daughter cells are called... View Article
The developing embryo at the blastocyst stage gets attached to the endometrium of the uterus through trophoblasts. The blastocyst gets totally... View Article
Sperm contains many enzymes in the acrosome, which help in entering the ovum. It contains degradative enzymes such as hyaluronidase, acrosin and... View Article
Zona pellucida is the glycoprotein layer, which surrounds the oocytes. Sperms need to penetrate this layer in order to reach the cytoplasm of the... View Article
At the secondary oocyte stage of oogenesis, ovulation takes place with the rupture of the Graafian follicle. Rapid secretion of LH induces... View Article
The implantation takes place at the blastocyst stage. The outer trophoblast layer gets attached to the endometrium and gets embedded. The inner... View Article
Only one sperm out of thousands of sperms released at the time of insemination can penetrate the egg and fertilise it. Entry of a sperm induces... View Article
The entry of one sperm through zona pellucida induces structural changes in the layer and prevents further entry of additional sperms. Also... View Article
Zona pellucida is the inner layer surrounding the oocyte. It consists of glycoproteins. Corona radiata is made up of multiple layers of granulosa... View Article
Oocyte is an immature egg. There are two types of oocytes. Primary oocytes give rise to secondary oocytes after meiosis I and a secondary oocyte... View Article
No, cells produced after meiosis contain half the number of chromosomes present in the parent cell. Meiosis occurs in germ cells to give rise to... View Article
