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प्रश्न
Differentiate between the following :
Spermatogenesis and oogenesis
उत्तर
| Spermatogenesis | Oogenesis | ||
| 1. | Spermatogenesis occurs in the testis of mature and fertile males. | 1. | Oogenesis occurs in the ovaries of mature and fertile females. |
| 2. | During spermatogenesis, four haploid sperms are produced from a single spermatogonium. | 2. | During oogenesis, one oogonium produces one haploid ovum and one polar body. |
| 3. | During the process of spermiogenesis, spermatids undergo metamorphosis. | 3. | There is no such process of metamorphosis in oogenesis. |
| 4. | Spermatid development occurs, which results in the formation of a functioning sperm. | 4. | During oogenesis, ootid development does not occur. It only appears after fertilisation. |
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संबंधित प्रश्न
State True/False with explanation.
Creating awareness about sex related aspects is an effective method to improve reproductive health of the people.
What is the causative organism for Gonorrhoea?
Name the contraceptive device used by the human males which acts as a sheath over the male organ and traps the sperms in it.
Name two devices used in the barrier method of birth control.
In which one of the following birth control methods, a small portion of oviducts of a woman is removed by surgical operation and the cut ends are ligated?
(a) copper-T
(b) tubectomy
(c) vasectomy
(d) diaphragm
In the surgical method of birth control available for human females, the structures P in the reproductive system are cut and ligated (tied up) properly at both ends. This prevents the reproductive cell Q released by an organ R from entering the structures P so that Q is not available to fuse with another reproductive cell S coming from the male reproductive system. In this way, pregnancy is prevented.
(a) What are structures P?
(b) What is cell Q?
(c) Name the organ R.
(d) What is the reproductive cell S?
(e) What is the name of this surgical method of birth control available to females?
The human males use a device X made of a very thin rubber sheet as a covering on the male organ to prevent pregnancy. This device traps the gametes Y in it. In order to prevent pregnancy, the human females use a device Z which is a circle of rubber with a metal spring around it. The device Z is put inside the vagina to cover the cervix. It stops Y from going into the uterus.
(a) What is device X?
(b) What are Y?
(c) Name the device Z.
(d) What is the general name of these methods of birth control (or preventing pregnancy)?
(e) The use of which contraceptive device, X or Z, can protect the persons from sexually transmitted diseases?
Surgical methods of contraception prevent gamete formation.
According to which of the following organization "reproductive health means a total well-being in all aspects of reproduction"?
RCH stands for ______.
A national level approach to build up a reproductively healthy society was taken up in our country in ______.
RCH stands for ______.
Which of the following method of contraception protects from acquiring sexually transmitted diseases?
Colonies of yeast fail to multiply in water, but multiply in sugar solution. Give one reason for this.
From the internet, gather information about the chromosome numbers of five animals and five plants. Correlate the number with the size of organism and answer the following questions.
- Do larger organisms have more number of chromosomes/cells?
- Can organism with fewer chromosomes reproduce more easily than organisms with more number of chromosomes?
- More the number of chromosomes/cells greater is the DNA content. Justify.
Trace the path of sperm during ejaculation and mention the gland and their functions associated with the male reproductive system.
Observe the chart and graph given in figure carefully and answer the following questions.
| Age in Years | % of full height | |
| Boys | Girls | |
| 8 | 72% | 77% |
| 9 | 75% | 81% |
| 10 | 78% | 84% |
| 11 | 81% | 88% |
| 12 | 84% | 91% |
| 13 | 88% | 95% |
| 14 | 92% | 98% |
| 15 | 95% | 99% |
| 16 | 98% | 99.5% |
| 17 | 99% | 100% |
| 18 | 100% | 100% |
- Which of the line represents the height of boys?
- Which line represents the height of girls?
- What is the difference between the pattern of increase in the height of boys and girls?
- Is this pattern true for each individual?
When was family planning programs initiated in India?
What is the full form of RCH?
Amniocentesis is a technique used to ______.
