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How does the ovum prevent multiple penetrations of sperm cells along it's periphery?
The ovum has a protective layer called the zona pellucida that hardens after the entry of one sperm cell, preventing additional sperm cells from penetrating. This process is known as the zona reaction and ensures only one sperm cell fertilizes the egg.
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 is a sperm or egg?
A sperm cell is the male reproductive cell responsible for fertilizing an egg cell during sexual reproduction. An egg cell, or ovum, is the female reproductive cell that contains genetic material and is needed for fertilization to occur.
What do you call when the sperm and ovum join together and form a single cell?
Faulty Condom? ---------------------------------------------------------------- I don't really want to delete an answer so..... It's called a zygote.
In internal fertilisation how many sperm cells and egg cells are wasted?
50 million sperm are discharged during just one ejaculation in a normal healthy male normally there is only one ovum released in the woman so in this case if the ovum is fertilised no egg cells are wasted and 49,999,999 sperm are wasted.
How does ovum prevent multiple penetrations of sperm cells along its periphery?
as soon as a single sperm fertilises the ovum a change of composition takes place in ovum's outer layer forming zona pellucida which prevents the penetration of other sperms.
How does the ovum prevent multiple penetrations of sperm cells along it's periphery?
The ovum has a protective layer called the zona pellucida that hardens after the entry of one sperm cell, preventing additional sperm cells from penetrating. This process is known as the zona reaction and ensures only one sperm cell fertilizes the egg.
What are Sex cells are called?
male=sperm Female=egg or ovum Zygote -- the cellular gruop formed after the joining of sperm and ovum
DNA is found only in sperm and ovum?
No, DNA isn't just found in the sperm and ovum. DNA is found in the nucleus of all cells in the body.
What is the function of the egg cell and sperm cell?
the sperm cells have to swim to the ovum and then fertilise it. and the egg cells have to reproduvce the offspring
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.
Which of the following terms are types of gametes A sperm whale and an octopus B a human sperm cell and a human ovum C a spirochete and an otolith?
B. A human sperm cell and a human ovum are types of gametes. Gametes are reproductive cells that fuse during fertilization to form a new organism. In the case of humans, sperm cells are the male gametes and ovum (egg) cells are the female gametes.
What are the names of the sex cells?
Do you mean sperm cells and egg cells? Spermatozoon and Ovum are fancier terms for the same.
Name some cells in the body?
red blood cell ovum sperm
Meiosis takes place in reproductive what are egg cells produce?
ovum and sperm
What special features of the sperm cells?
they have long tails for swimming and heads to get into the ovum
How are cells arranged from smallest to biggest?
Sperm cells--->RBCs--->tissue cells---->nerve cells with all their parts--->ovum.The smallest is the sperm cell, next is the red blood cell, next are other tissue cells, next are nerve cells and the largest is the ovum (egg).
