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प्रश्न
What is spermatogenesis?
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उत्तर
Spermatogenesis is the process by which male spermatogonia develop into adult male gametes called spermatozoa. It begins at puberty and usually lasts until death, with only a tiny decline in the amount of sperm produced as age increases.
संबंधित प्रश्न
______ type of reproduction occurs without fusion of gametes.
Which precautions will you follow to maintain the reproductive health?
Explain the structure of secondary oocyte.
Give scientific reason.
There is a menopause when women are 45-50 years old.
The male sex hormone testosterone is secreted from ____________.
Which of the following enter the maturation phase of oogenesis?
Identify the labels (i-iv) in the given diagram of the ovum.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
The immature male germ cells differentiates into ______ at the end of meiosis I.
Four primary spermatocytes give rise to ______.
In human beings, the largest cell formed during Oogenesis is ______
Conversion of spermatid into sperm is called as _______.
How many sperms are formed from a secondary spermatocyte?
Acrosome reaction in sperm is triggered by ______.
Which among the following has 23 chromosomes?
Identify the wrong statement from the following.
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 ______.
Preparation of sperm before penetration of ovum is ______.
The head of the epididymis at the head of the testis is called ______.
At what stage of life is oogenesis initiated in a human female?
In oogenesis haploid egg is fertilised by sperm at which stage?
Layers of an ovum from outside to inside is ______.
Head of epididymis is called as ______.
Which of the following are called dual gland?
After the release of the secondary oocyte, the Graafian follicle develops into ______.
In the process of fertilization, this is true:
Growth hormone of pituitary is more effective in ______.
Germ cells present in the seminiferous tubules undergo ______
How many spermatozoa are formed from one secondary spermatocyte?
In spermatogenesis, at the end of the first meiotic division ______ are formed.
Process of maturation and development of sperms ______.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
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'.
Select a correct pair of cells with identical set of chromosomes.
Complete the analogy with respect to the structure of sperm.
Nebenkern : ‘X’ : : Acrosome is formed from : ‘Y’
