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Pigmented area. Solution. Verified by Toppr. Ovum acquires polarity as two poles become distinct. At one end the cytoplasm is more active and contains the nucleus while at the other, called the vegetal pole, the cytoplasm is less active and contains most of the yolk.
Layers of an ovum from outside to inside is. corona radiata, zona pellucida and vitelline membrane; zona pellucida, corona radiate and vitelline membrane; vitelline membrane, zena uelludda and corona radiata; zona pellucida, vitelline membrane and corona radiata.
Draw a labeled diagram of human ovum released after ovulation. Solution. Verified by Toppr. Ovulation is the release of eggs from the ovaries. In humans, this event occurs when the ovarian follicles rupture and release the secondary oocyte ovarian cells. After ovulation, during the luteal phase, the egg will be available to be fertilized by sperm.
Chemically. Solution. Verified by Toppr. When the sperm comes in contact with the ovum, the acrosomal reaction takes place whereby the sperm releases the enzyme, hyaluronidase and acrosin, which begins to dissolve the actin filaments. As the enzymes are involved, the penetration is chemical in nature.
The outermost membranous. cover of the ovum at ovulation is corona radiata. It is formed by follicular cells. Inner to corona radiata is zona pellucida, with is made up of three different glycoproteins secreted by the ovum itsel
Sperm, implantation, fertilization, ovum, afterbirth. Solution. Verified by Toppr. Out of the given options, sperm, ovum, implantation, and fertilization are all cells or events that take place inside the body of either a male or a female. However, afterbirth is the term used for the events that take place after parturition.
During oogenesis, primary oocyte grows and completes meiosis I (first maturation division) producing a large secondary oocyte and a small polar body. The secondary oocyte proceeds with meiosis II (second maturation division) but the diyision gets arrested at metaphase stage. It is in this stage of oocyte that the ovum is shed during ovulation.
a) The given diagram shows the labelled sketch of human ovum showing corona radiata. b) Zona pellucida forms the protective layer of oocyte and embryo during development. It is responsible for regulation of interaction between ovulated egg and free floating sperm
• The ovaries produce the female egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur.
Solution. Verified by Toppr. Once a sperm comes In contact with the zona pellucida of the ovum, it induces changes In its membrane. These changes prevent the entry of other sperm into the ovum and thus prevent polyspermy. Was this answer helpful?
