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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
Do you think that reproductive health in our country has improved in the past 50 years? If yes, mention some such areas of improvement.
Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.
Name one sexually transmitted disease for which no definite cure has been found so far. What is the causative organism of this disease?
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 the contraceptive device used by human females which is put over the cervix.
Name the disease caused by HIV.
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
A woman uses pills A as a method of birth control (or preventing pregnancy). The pills A stop the ovaries from releasing ovum into oviducts. Another woman uses pills B as a method of birth control. The pills B kill the sperms and prevent pregnancy.
(a) What do the pills A contain?
(b) What is the common name of pills A?
(c) What do the pills B contain?
(d) What is the common name of pills B?
(e) What is the general name of these methods of birth control?
Define and give the role of amniocentesis.
What is contraception? List four different methods. State four reasons for adopting contraceptive methods.
What can you suggest to your classmates to keep himself/herself clean and healthy?
What is the need for contraception?
Which one amongst the following is the first country in the world to initiate action plans and programmes at a national level to attain total reproductive health as social goal?
Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure D and E by indicating the regenerated regions.
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 |
 |
 |
 |
| A | B | C | D | E |
In figure, mark the positions of the endocrine glands which release the hormones that
- control the release of sex hormone
- are responsible for the secondary sexual characters in boys.
- prevent diabetes.
- maintain the correct salt balance in the blood.
It is believed that height of a child depends upon the genes inherited from parents. However, it is often seen that tall parents may have short . children and vice-versa. Are these factors other than genes that can cause these variations?
Do you justify the statutory ban on amniocentesis in our country? Give reasons.
What is the exact action of birth control pills?
