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प्रश्न
Males in whom testes fail to descend to the scrotum are generally infertile. Why?
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उत्तर
If the testes fail to descend to the scrotum, gametogenesis could be inhibited, the process of spermatogenesis require a marginally lesser ambient temperature than that in the abdominal cavity.
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संबंधित प्रश्न
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.
- 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.
- State any two reasons responsible for the cause of infertility.
- Suggest a technique that can help the couple to have a child where the problem is with male partner.
Correct the following statement:
In E. T. techniques, embryos are always transferred into the uterus.
Expand the following:
ZIFT
Give four causes of infertility in males.
Short answer question.
Write a note on IVF.
Explain any three methods that can be used to overcome infertility.
Correct the following statement.
Transfering of an embryo with more than 8 blastomeres into the uterus is called GIFT.
The procedure of GIFT involves the transfer of female gametes into the fallopian tube, can gametes be transferred to the uterus to achieve the same result? Explain.
Choose the correct statement regarding the ZIFT procedure.
Artificial insemination means ______.
Identify the correct reasons for infertility.
(i) Drugs
(ii) Diseases
(iii) Congenital
(iv) Use of Contraceptives
(v) Immunological or psychological
(vi) Assisted reproductive technology
Write the long form of GIFT.
Give a term for the following:
An ART in which eggs are removed from the ovary of the female, fertilised and then placed in her fallopian tube.
Expand the term ZIFT.
The ______ is also called the womb.
Name any two Cu-ions releasing IUDs.
Explain any two ways by which IUDs devices act as contraceptives.
Which one of the following choices reflects the correct number of chromosomes in the zygote and in the second polar body of Drosophila melanogaster?
| Zygote | Meiocytes | |
| I | 08 | 08 |
| II | 04 | 08 |
| III | 08 | 04 |
| IV | 04 | 04 |
