मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.

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प्रश्न

Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.

सविस्तर उत्तर
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उत्तर

Amniocentesis is a technique in which a part of the amniotic fluid is taken out from the mother’s womb with a syringe. This fluid contains the cells of the fetus, by analyzing the chromosomes of which the sex of the foetus, genetic structure, genetic disorders and metabolic disorders can be detected. Therefore, the primary purpose of this testing process is to detect any possible disability or disorder in the child to be born so that the mother can get a basis for abortion. But nowadays, this technique is being misused to determine the sex of the foetus and to kill the female foetus. As a result, the sex ratio of our country is becoming unbalanced. Even if the female foetus is normal, abortion is done because in our society, the birth of a son is still given priority. Such an abortion is equivalent to the murder of a child, so it is very important to put a legal ban on amniocentesis.

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पाठ 3: Reproductive Health - EXERCISES [पृष्ठ ५०]

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एनसीईआरटी Biology [English] Class 12
पाठ 3 Reproductive Health
EXERCISES | Q 8. | पृष्ठ ५०
नूतन Biology [English] Class 12 ISC
पाठ 3 Reproductive Health
NCERT EXERCISES WITH ANSWERS | Q 8. | पृष्ठ १४२

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्‍न

Is sex education necessary in schools? Why?


What does IUCD indicate?


Write the full form of the following as it occur in biology :

HIV


What is the causative organism for the following disease?

Syphilis


What are the three types of methods used for birth control (or regulating child birth)? Give one example of each type.


What substances are contained in vaginal pills, used as contraceptives? How do they work?


How does copper-T prevent pregnancy?


 What is the name of surgical method of birth control (or preventing pregnancy) which is carried out  in women?


AIDS is a deadly disease which is caused by :
(a) a protozoan
(b) a fungus
(c) a bacterium
(d) a virus


A, B and C are three common STDs. A and C are caused by bacteria whereas B is caused by a virus D. The virus D reduces the immunity of the infected person to such a low level that the person can die of even very mild diseases.
(a) What could A and C be?
(b) What is B?
(c) Name the virus D?
(d) How can A, B and C be caused?
(e) Out of A, B and C, which one does not have a definite cure as yet?


What are Sexually Transitted Diseases (STD)? List two viral and two bacterial STDs. 


What is contraception ? List three reasons for adopting contraceptive methods. 


Expand the following abbreviation:

IUCD


What is contraception? List four different methods. State four reasons for adopting contraceptive methods.


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?


RCH stands for ______.


Colonies of yeast fail to multiply in water, but multiply in sugar solution. Give one reason for this.


Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure D and E by indicating the regenerated regions. 

A B C D E

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.

  1. Do larger organisms have more number of chromosomes/cells?
  2. Can organism with fewer chromosomes reproduce more easily than organisms with more number of chromosomes?
  3. More the number of chromosomes/cells greater is the DNA content. Justify.

In tobacco plant, the male gametes have twenty four chromosomes.

What is the number of chromosomes in the female gamete?

What is the number of chromosomes in the zygote?


Reproduction is linked to stability of population of a species. Justify the statement.


Given below are events that lead to pregnancy and development of embryo.

  1. Fertilization of egg
  2. Maturation of egg
  3. Release of egg
  4. Embedding of embryo in thickened uterine wall.

Which of the following options gives the correct order of sequence in which they occur?


John and Radha were classmates since childhood. When Radha became eleven years old, she developed a little swelling on her neck. She visited the doctor who started medication for her. After a few years, John also developed a slight protrusion on his throat. He got worried and went to the doctor. But, the doctor assured him that it was a normal feature in boys while they are growing up. Can you think of any reasons for the difference in diagnoses?


Observe the chart and graph given in the 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%
  1. Which of the line represents the height of boys?
  2. Which line represents the height of girls?
  3. What is the difference between the pattern of increase in the height of boys and girls?
  4. Is this pattern true for each individual?

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 there factors other than genes that can cause these variations?


______ is responsible for the declining female: male ratio.


Amniocentesis technique is ______.


Which is the most commonly prescribed non-steroidal oral contraceptive pill in India?


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