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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
Women are often blamed for producing female children. Consequently, they are ill-treated and ostracized. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
Male and female gametes are ______.
Ovulation is induced by a hormone called ______.
Name the hormones involved in regulation of spermatogenesis.
______ type of reproduction occurs without fusion of gametes.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
Explain the structure of secondary oocyte.
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
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?
At what stage of development are the gametes formed in newborn male and female?
Expand the acronym.
LH
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.
During spermatogenesis, spermatogonium grows in size to become ______.
The secondary oocyte enter into the fallopian tube through the ______.
Formation of ____________ is an indication of the termination of oogenesis.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Identify the longest period of menstrual cycle.
What is the location of oogenesis?
______ undergoes 2nd meiotic division during spermatogenesis.
Conversion of spermatid into sperm is called as _______.
How many autosomes does a human primary spermatocyte have?
Which of the following contains a fluid filled cavity called antrum?
In spermatogenesis, reduction division of chromosome occurs during conversion of ______.
Acrosome is a type of ______.
At what stage of life is oogenesis initiated in a human female?
1st polar body is formed at which stage of oogenesis?
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
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:
How many primary oocytes produce one oogonia?
The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
During spermatogenesis meiosis occurs in ______.
Process of maturation and development of sperms ______.
Distinguish between human sperm and ovum.
Match List - I with List - IІ.
| List - I | List - II |
| A. Head | I. Enzymes |
| B. Middle piece | II. Sperm motility |
| C. Acrosome | ΙII. Energy |
| D. Tail | IV. Genetic material |
Choose the correct answer from the options given below:
Which gamete is produced through oogenesis?
What is the primary purpose of gametogenesis in organisms?
