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प्रश्न
The fusion of the male and the female gametes is called ______.
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उत्तर
The fusion of the male and the female gametes is called fertilisation.
Explanation:
The process of fusion of a sperm with an ovum is called fertilisation. During fertilisation, a sperm comes into contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms. Thus, it ensures that only one sperm can fertilise an ovum.
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संबंधित प्रश्न
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
Explain the structure of secondary oocyte.
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
The Androgen Binding Protein (ABP) is produced by ____________.
Which is the correct order of steps occurring during spermatogenesis?
Select the pair of cells which does not divide further by mitosis.
In human beings, the largest cell formed during Oogenesis is ______
Acrosome reaction in sperm is triggered by ______.
Which of the following contains a fluid filled cavity called antrum?
There is no cell division involved in ______.
It The cell division in secondary oocyte is suspended at ______.
Identify the wrong statement from the following.
Spermiation is the process of the release of sperm from ______.
Cells of corona radiata remain grouped together by ______.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
How many sperms are formed from 4 primary spermatocytes?
Aquatic animals in which fertilisation occurs in water are said to be
Observe the given figure and answer the questions that follow.
- Label A and B.
- Identify the process.
- What happens during this process and what is formed?
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
In the process of fertilization, this is true:
3-celled male gamete develops in:
Human milk differs from cow's milk because human milk contains:
In human females, meiosis II is not completed until:
The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
The diagram given below shows the various steps in spermatogenesis.
- Name the parts labelled '1', '2' and '3'.
- Name the process by which part '3' changes to part '4'.
Which of the following phases are shared by both spermatogenesis and oogenesis?
