0
6 Why can a second sperm not penetrate an already fertilized ovum?
Wiki User
∙ 14y ago
Once a sperm penetrates the egg, changes occur on the membrane, effectively making it impenetrable to others. It is possible, however, for 2 sperms to penetrate at the same time, which could mess things up.
Wiki User
∙ 14y ago
Wiki User
∙ 7y agoFrom HowStuffWorks, "Once a single sperm has penetrated the egg, the cell membrane of the egg changes its electrical characteristics. This electrical signal causes small sacs just beneath the membrane (cortical granules) to dump their contents into the space surrounding the egg. The contents swell, pushing the other sperm far away from the egg in a process called cortical reaction. The cortical reaction ensures that only one sperm fertilizes the egg. The other sperm die within 48 hours."
Add your answer:
Earn +20 pts
When a sperm unites with an egg what is the fertilized egg?
The gametes, or "sex cells" - the sperm and ovum (egg) - become the fertilized egg (zygote) when they fuse.
Could it be pregnant if the sperm is put into the?
Yes, if the sperm is in the egg, the egg is fertilized.
When the ovum is fertilized by the sperm this is called?
Implantation
Why only one sperm cell can fertilized an ovum?
Ovum has a layer of zona pellucida around itself. When a sperm enters the ovum, the cortical granules present in the ovum, causes the thickening of the zona pellucida. This prevents the entry of other sperms in the ovum and only one sperm is able to fertilize the egg.
What does the sperm cell use to penetrate the egg?
The sperm structure containing enzymes to break down the egg's protective coating is called the Acrosome.
Why can a second sperm not penetrate an already fertilized ovum?
Once a sperm penetrates the egg, changes occur on the membrane, effectively making it impenetrable to others. It is possible, however, for 2 sperms to penetrate at the same time, which could mess things up.
How Is Sperm Cell Fertalized?
Sperm cells fertilize the ovum, they are not fertilized. The primary reason for how the term is used is because most sperm compete to reach and penetrate the egg.
Where does the excess sperm go when the egg is already fertilized?
The excess sperm dies and it dissolves.
Can a egg be fertilized before menustration if there is sperm already present before menustration?
Yes it can.
How does the sperm go about keeping the egg fertilized?
The sperm doesn't have to. Once the egg is fertilized it stays fertilized.
How is a human egg fertilized?
Sperm
When a sperm unites with an egg what is the fertilized egg?
The gametes, or "sex cells" - the sperm and ovum (egg) - become the fertilized egg (zygote) when they fuse.
What is immediately produced when an animal's egg cell is fertilized by the sperm?
Zygote is immediately produced when an animal's egg cell is fertilized by the 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.
Are babies born by sparma?
First of all, it's called "sperm" or "sperma." Second, no. It's the egg cell that gets fertilized by the sperm cell and activates a process which evolves the egg.
Can sperm penetrate cotton?
No. It does not have strong enough 'swimming' capabilities to penetrate clothing, including cotton.
What is formed when a sperm fertilized an egg?
Zygote
