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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.
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संबंधित प्रश्न
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.
The process of release of the ovum from a mature follicle is called ______.
Name the functions - Acrosome of sperm.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
Define gametogenesis.
Formation of ____________ is an indication of the termination of oogenesis.
First meiotic division is observed in ____________.
How many autosomes does a human primary spermatocyte have?
Middle piece of mammalian sperm possesses ______.
Extrusion of second polar body from egg nucleus occurs ______.
After ovulation, Graafian follicle regresses into ______.
Sertoli cells are found in ______.
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.
Connective tissue around seminiferous tubules possess endocrine cells called ______.
Which among the following has 23 chromosomes?
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
The prostate gland and seminal vehicle perform the function of ______.
Penetration of the sperm in the ovum is followed by ______
The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:
Capacitation refers to changes in the ______.
How many primary oocytes produce one oogonia?
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring. What are the processes through which these events take place?
What is spermatogenesis?
Meiotic division of the secondary oocyte completed ______.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
Explain Oogenesis with diagram.
