Questions for 25 July zoology

Q:-1 What is dosage compensation? Explain lyonnhypothesis. Discuss its significance. (20)

Q:-2 Discuss the sex determination process in Drosophila. How it is different from humans. (15)

Q:-3 Describe the molecular mechanism of sex determination in human. Comment on evolution of Y chromosome in mammals. (20)

Q:-4 What are anadromous fishes? How their migration process different from catadromous fishes. Describe the significance of migration. (20)

Q:-5 Discuss the process of osmoregulation in pieces. Describe their respiration in brief. (15)

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