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What layers do sperm penetrate to fertilize the oocyte?
Sperm penetrate through the zona pellucida, an acellular glycoprotein layer surrounding the oocyte, to reach the oocyte membrane for fertilization. The sperm then binds to specific receptors on the oocyte membrane to release enzymes that help in penetrating the oocyte membrane to fuse with the oocyte.
When a primary oocyte divides a secondary oocyte and what are produced?
A primary oocyte divides into a secondary oocyte and a polar body during meiosis I. The secondary oocyte undergoes meiosis II to produce a mature ovum (egg) and another polar body.
What is germinal vesicle?
The germinal vesicle is a large, prominent nucleus found in the immature oocyte (egg cell) of female animals. It contains the genetic material of the cell and is essential for the early stages of oocyte maturation and development.
When the primary oocyte divides a secondary oocyte and what else is produced?
The primary oocyte divides into a secondary oocyte and a polar body during meiosis I. The secondary oocyte then goes through meiosis II to produce a mature ovum (egg) and another polar body.
In which stage is a primary oocyte arrested?
A primary oocyte is arrested in the prophase stage of meiosis I.
Is It the secondary oocyte and not the egg that the sperm fertilizes?
Yes, it is the secondary oocyte that the sperm fertilizes. The secondary oocyte completes meiosis II to become a mature egg only after fertilization.
In what phase of meiosis is a secondary oocyte arrested?
A secondary oocyte is arrested in the metaphase II phase of meiosis.
At what stage of development does a secondary oocyte arrest in?
A secondary oocyte arrests in the metaphase II stage of development.
When will a secondary oocyte complete meiosis II?
A secondary oocyte will complete meiosis II after fertilization by a sperm cell.
How does the sperm penetrate the oocyte?
Sperm has enzymes that breakdown the outer coat of the oocyte. It takes many sperm with all their enzymes working together to accomplish this.
The cell commonly called the egg or ovum is more correctly called?
The egg or ovum is more correctly called an oocyte. It is referred to as an oocyte until it is fertilized by sperm, after which it becomes an embryo.
Words starting with OO?
oocyte
