Which of the following cannot be detected in a developing foetus by amniocentesis?
Klinefelter's syndrome
sex of the foetus
Down's syndrome
Down's syndrome
D.
Down's syndrome
Amniocentesis is a foetal sex determination test based on the chromosomal pattern in the amniotic fluid surrounding the developing embryo. Jaundice is a condition not based on chromosomal pattern It is a disease related to liver dysfunctions.
In a context of amniocentesis, which of the following statement is incorrect?
It is used for prenatal sex determination
It can be used for detection of down syndrome
It can be used for detection of cleft palate
It can be used for detection of cleft palate
C.
It can be used for detection of cleft palate
Cleft palate is a developmental abnormality which may occur in the developing foetus and so it can be detected by sonography and not amniocentesis.
Which of the following approaches does not give the defined action of contraceptive?
| Intra-uterine devices | Increase phagocytosis of sperms, suppress sperm motility and fertilising capacity of sperms. |
| Hormonal contraceptives | Prevent/retard entry of sperms, prevent ovulation and fertilisation |
| Vasectomy | Prevents spermatogenesis |
| Vasectomy | Prevents spermatogenesis |
C.
| Vasectomy | Prevents spermatogenesis |
Vasectomy blocks the gamete transport and does not affect spermatogenesis.
A large number of married couples the world over are childless. It is shocking to know that in India the female partner is often blamed for the couple being childless.
(a) Why in your opinion the female partner is often blamed for such situations in India ? Mention any two values that you as a biology student can promote to check this social evil.
(b) State any two reasons responsible for the cause of infertility.
(c) Suggest a technique that can help the couple to have a child where the problem is with the male partner.
(a) In India the female partner is often blamed for the couple being childless because our society is a male dominating society so nobody blames the male. Lack of education, awareness is the another reason. People are not aware about scientific reasons for infertility.
Two values that we can promote to check this social evil are:
i. People should be given proper education about all this. They should be made to understand that both the male and the female can have problems.
ii. They should be made aware of the causes for infertility and the ways how to overcome it.
(b) The reasons responsible for the cause of infertility are -:
i. Physical
ii. Congenital etc.
(c) Artificial insemination is a technique that can help the couple to have a child where the problem is with male partner. In this technique, semen collected either from husband or a healthy donor is artificially introduced into vagina or uterus of the female.
It is commonly observed that parents feel embarrassed to discuss freely with their adolescent children about sexuality and reproduction. The result of this parental inhibition is that the children go astray sometimes.
(a) Explain the reasons that you feel are behind such embarrassment amongst some parents to freely discuss such issues with their growing children.
(b) By taking one example of a local plant and animal, how would you help these parents to overcome such inhibitions about reproduction and sexuality ?
Parents feel embarrassed as : -
(a) Indian Society is not that broad minded and parents feel shy talking openly regarding these matters to their children due to which their children go astray sometimes. But parents should consider that at adolescence parents should behave like friends to their child. So that child could also share his problems with parents. Parents should give right information about the reproductive aspects, sexual practices, adolescence changes to their children so that their children will never be misleaded.
(b) By an example of male honey bee and orchid ophyrys flower, it is evident that sexual attraction is a natural phenomenon, the honey bee is attracted to a ophrys flower and assumes its one petal as its female partner & pseudo copulates with it. So it is a natural phenomenon & parents should talk regarding this matter to their children.
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