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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
How is 'oogenesis' markedly different from 'spermatogenesis' with respect to the growth till puberty in the humans?
Explain the development of a secondary oocyte (ovum) in a human female from the embryonic stage upto its ovulation. Name the hormones involved in this process.
Define spermiation.
Draw a labelled diagram of sperm.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
Explain two main process in sexual reproduction.
The glandular accessory organ which produces the largest proportion of semen is ____________.
Which of the following correctly describes the secondary oocyte?
Identify the proper order of spermatogenesis and choose the correct option.
Middle piece of mammalian sperm possesses ______.
It The cell division in secondary oocyte is suspended at ______.
Corona radia is made up of ______.
Cavity of graafian follicle is ______.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
Preparation of sperm before penetration of ovum is ______.
The head of the epididymis at the head of the testis is called ______.
The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called ______.
1st polar body is formed at which stage of oogenesis?
After the release of the secondary oocyte, the Graafian follicle develops into ______.
Read the following and answer from given below:
Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.
Which cell division is involved in the formation of secondary oocytes?
What does the figure represent?
In the process of fertilization, this is true:
3-celled male gamete develops in:
If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:
In spermatogenesis, at the end of the first meiotic division ______ are formed.
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
Distinguish between human sperm and ovum.
Draw a labelled diagram of a section through the ovary.
Select a correct pair of cells with identical set of chromosomes.
Match List - I with List - IІ.
| List - I | List - II |
| A. Head | I. Enzymes |
| B. Middle piece | II. Sperm motility |
| C. Acrosome | ΙII. Energy |
| D. Tail | IV. Genetic material |
Choose the correct answer from the options given below:
