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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
Give the name and function for ‘A’ and ‘B’ from the diagram given below
The following is the illustration of the sequence of ovarian events (a − i) in a human female
(i) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
(ii) Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event.
(iii) Explain the changes that occur in the uterus simultaneously in anticipation.
(iv) Write the difference between ‘c’ and ‘h’.
(v) Draw a labeled sketch of the structure of a human ovum prior to fertilization.
Ovulation is induced by a hormone called ______.
What is oogenesis?
Describe the process of budding in hydra.
Which precautions will you follow to maintain the reproductive health?
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
Multiple choice question.
The given figure shows human sperm. Various parts of it are labelled as A, B, C, and D. Which labelled part represents acrosome?
Identify the given image and label its parts marked as a, b, c and d
The secondary oocyte enter into the fallopian tube through the ______.
The part labelled as ______ contains the energy source that facilitates sperm motility.
The immature male germ cells differentiates into ______ at the end of meiosis I.
Which of the following is diploid?
First meiotic division is observed in ____________.
Draw a labelled diagram of a Graafian Follicle.
In human beings, the largest cell formed during Oogenesis is ______
The principal tail piece of human sperm shows the microtubular arrangement of ______.
Acrosome is a type of ______.
Head of epididymis is called as ______.
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
In the process of fertilization, this is true:
Which of the following cells during gametogenesis is normally diploid?
What is the difference between a primary oocyte and a secondary oocyte?
Process of maturation and development of sperms ______.
Sketch and label the process of oogenesis.
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
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:
Complete the analogy with respect to the structure of sperm.
Nebenkern : ‘X’ : : Acrosome is formed from : ‘Y’
