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The sperm penetrates the oocyte by first binding to the zona pellucida layer surrounding the oocyte. This triggers the acrosome reaction, releasing enzymes that help break down the zona pellucida. Once the sperm penetrates this layer, it fuses with the oocyte membrane to release its genetic material.
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What does the sperm cell use to penetrate the egg?
The sperm cell uses an enzyme called hyaluronidase to break down the outer layers of the egg, allowing it to penetrate and fertilize the egg.
What destroys the sperm receptors on the surface of oocyte?
The acrosome reaction, triggered by the binding of sperm to the zona pellucida of the oocyte, releases enzymes that help degrade the zona pellucida. This process ultimately leads to the disruption of the sperm receptors on the surface of the oocyte, allowing only one sperm to successfully fertilize the egg.
What is the difference between ovum and secondary oocyte?
An ovum is a mature female reproductive cell that has completed meiosis. A secondary oocyte is an intermediate stage in meiosis that occurs during ovulation and has not yet completed meiosis.
Where does fertilization of a oocyte usually occur?
Fallopian Tube
When does the secondary oocyte complete its second meiotic division to become a mature ovum?
The secondary oocyte completes its second meiotic division upon fertilization by a sperm cell. This leads to the formation of a mature ovum and a polar body.
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.
What does contact of a sperm with the oocyte membrane cause?
The contact of a sperm with the oocyte membrane triggers a series of reactions that lead to the fertilization process. This includes the release of enzymes that help the sperm penetrate the oocyte, the fusion of the sperm and egg membranes, and ultimately the formation of a zygote containing a complete set of chromosomes from both parents.
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.
What does the sperm cell use to penetrate the egg?
The sperm cell uses an enzyme called hyaluronidase to break down the outer layers of the egg, allowing it to penetrate and fertilize the egg.
Does contact of a sperm with the oocyte membrane cause a completion of the second meosis?
Yes, contact of a sperm with the oocyte membrane triggers the completion of the second meiosis in the oocyte, leading to the formation of the female pronucleus. This process is essential for fertilization to occur.
What destroys the sperm receptors on the surface of oocyte?
The acrosome reaction, triggered by the binding of sperm to the zona pellucida of the oocyte, releases enzymes that help degrade the zona pellucida. This process ultimately leads to the disruption of the sperm receptors on the surface of the oocyte, allowing only one sperm to successfully fertilize the egg.
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.
When does an oocyte complete meiosis II?
An oocyte completes meiosis II after it is fertilized by a sperm cell. This process results in the formation of a mature ovum (egg) with a haploid set of chromosomes.
What does the joining of the chromosomes of a sperm with those of an oocyte initially form?
A single cell is formed
What kind of gametocype is 'oocyte'?
"Oo" is the prefix for "egg" and "cyte" is the suffix for "cell," so an "oocyte" is an egg cell. It is the fundamental female sex cell, complementary to the male sperm.
Which component is vital for sperm to be able to penetrate the layers surrounding the egg?
The shape of the sperm is a component needed in order for the sperm to penetrate the layers surrounding the egg. Each sperm needs a head, tail, and mid-piece.
What is the difference between ovum and secondary oocyte?
An ovum is a mature female reproductive cell that has completed meiosis. A secondary oocyte is an intermediate stage in meiosis that occurs during ovulation and has not yet completed meiosis.
