हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

The fusion of the male and the female gametes is called ______.

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प्रश्न

The fusion of the male and the female gametes is called ______.

रिक्त स्थान भरें
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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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अध्याय 2: Human Reproduction - NCERT EXERCISES [पृष्ठ ११६]

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नूतन Biology [English] Class 12 ISC
अध्याय 2 Human Reproduction
NCERT EXERCISES | Q 1. (h) | पृष्ठ ११६

संबंधित प्रश्न

Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.


Give scientific reason.

There is a menopause when women are 45-50 years old.


Mention the differences between spermiogenesis and spermatogenesis.


Identify the given image and label its parts marked as a, b, c and d


Expand the acronym.

LH


The secondary oocyte enter into the fallopian tube through the ______.


The part labelled as ______ contains the energy source that facilitates sperm motility.


Which of the following occurs during maturation phase of spermatogenesis?


The immature male germ cells differentiates into ______ at the end of meiosis I. 


Find out the CORRECT sequence of spermatogenesis.


In human beings, the largest cell formed during Oogenesis is ______


Extrusion of second polar body from egg nucleus occurs ______.


Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?


The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.

Choose the correct one with reference to the above.


The cell which undergoes meiosis I during spermatogenesis is the ______.


Spermiation is the process of the release of sperm from ______.


How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.


Cells of corona radiata remain grouped together by ______.


A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.


At what stage of life is oogenesis initiated in a human female?


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:


Germ cells present in the seminiferous tubules undergo ______


The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.


Draw a neat and labelled diagram of spermatogenesis.


Which gamete is produced through oogenesis?


What are the two main types of gametogenesis based on the organ in which they occur?


Which of the following phases are shared by both spermatogenesis and oogenesis?


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