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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
With the help of diagrammatic representation, explain the process of gametogenesis
Ovulation is induced by a hormone called ______.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
Explain the structure of secondary oocyte.
Describe the process of oogenesis in human female.
Give scientific reason.
There is a menopause when women are 45-50 years old.
Explain two main process in sexual reproduction.
Sex organs produce gametes which are diploid.
Answer the following type of question Assertion (A) and Reason (R).
(A) - Head of the sperm consists of acrosome and mitochondria.
(R) - Acrosome contains spiral rows of mitochondria.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Select the correct sequence of oogenesis.
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
Four primary spermatocytes give rise to ______.
First meiotic division is observed in ____________.
Find out the CORRECT sequence of spermatogenesis.
Sertoli cells are found in ______.
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 ______.
Gray crescent is the area ______.
Preparation of sperm before penetration of ovum is ______.
The head of the epididymis at the head of the testis is called ______.
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
Acrosome is a type of ______.
1st polar body is formed at which stage of oogenesis?
Which of the following is a primary sex organ of female?
Which of the following are called dual gland?
Select the correct sequence of stages of spermatogenesis in a human male ______.
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?
Follicular atresia is:
Human milk differs from cow's milk because human milk contains:
Capacitation refers to changes in the ______.
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
What is the difference between a primary oocyte and a secondary oocyte?
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
