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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
Give the name and function for ‘A’ and ‘B’ from the diagram given below
The process of release of the ovum from a mature follicle is called ______.
Name the hormones involved in regulation of spermatogenesis.
What is oogenesis?
Identify True/False statement. Correct the false statement to make it true.
Oogenesis takes place in the corpus luteum.
Name the functions - Acrosome of sperm.
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.
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
Give scientific reason.
There is a menopause when women are 45-50 years old.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
The male sex hormone testosterone is secreted from ____________.
The glandular accessory organ which produces the largest proportion of semen is ____________.
Mammalian egg is ____________.
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
Complete the analogy.
1 primary spermatocyte : 4 spermatozoa :: 1 primary oocyte : ____________.
Identify the diploid cell.
Identify the proper order of spermatogenesis and choose the correct option.
Select the correct sequence of oogenesis.
Which of the following is diploid?
First meiotic division is observed in ____________.
Which of the following events take place during spermatogenesis?
Conversion of spermatid into sperm is called as _______.
The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to the above.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
The nutritive cells found in seminiferous tubules are ______.
Which of the following groups of cells in the male gonad, represent haploid cells?
The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called ______.
Penetration of the sperm in the ovum is followed by ______
Aquatic animals in which fertilisation occurs in water are said to be
Fetal sex can be determined by examining cells from amniotic fluid looking for:
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:
Which of the following cells during gametogenesis is normally diploid?
Capacitation refers to changes in the ______.
In spermatogenesis, at the end of the first meiotic division ______ are formed.
Draw a neat and labelled diagram of spermatogenesis.
