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प्रश्न
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 |
विकल्प
I
II
III
IV
उत्तर
III
APPEARS IN
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.
(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 male partner
Explain one application of the following:
ZIFT
Fill in the blank:
The disc-like structure which helps in the transfer of substances to and from the fetus’s body is called _______.
Correct the following statement.
Transfering of an embryo with more than 8 blastomeres into the uterus is called GIFT.
Expand the following.
ZIFT
Artificial insemination means ______.
The stage transferred into the lotuses after induced fertilization of ova in the laboratory is ______.
Males in whom testes fail to descend to the scrotum are generally infertile. Why?
What are the Assisted Reproductive Techniques practised to help infertile couples? Describe any three techniques.
Placed below are case studies of some couples who were not able to have kids. These couples are not ready for adoption or taking gametes from donors. After thoroughly examining the cases, which Assisted Reproductive Technology will you suggest to these couples as a medical expert? Explain briefly with justification of each case.
| Couple | Test reports of Female partner |
Test reports of male partner |
| Couple 1 | Normal reports | Normal sperms in testes, Missing connection in epididymis and Vas deferens. |
| Couple 2 | Blockage in the fallopian tube | Normal reports |
| Couple 3 | Normal reports | Poor semen parameters in terms of count, motility and morphology. |
| Couple 4 | low ovarian reserve | Normal reports |
| Couple 5 | Sterilization in male | Morphologically abnormal sperms |
