8x5=40

1. Write notes on the following
Sex determination id nematodes

Protective m11mcry an . I d warning murucry
Convergent evolutioili and divergent evolution
Post-transcriptio.. lgene regulation
Concept of cladistids
2.Answer the following in detail
Considering the inJeritance of earlobes in humans in a given population. 84% of people have free earlobes, whereas 16% of people have attached earlobes. Calculate the frequencies of F and f alleles and frequencies of three different genotypes with reference to Hardy-Weinberg law. 20
Describe the process of sex determination in Drosophila with emphasis on polyploidy and gyru,mdromorphism. 20
3. Answer the following
What is meant by •tvalue' paradox? Describe the ultrastructure of chromatin with emphasis on hucleosome and solenoid model of chromatin. 20 ·
What are fossils? Describe the process of fossilization in brief. Discuss the
evolution of elepha/nt in brief. Draw suitable diagrams. Prepare a tabulated
account on one separate sheet. 20

4. Answer the following
What is a congenital disease? Enlist various congenital diseases of humans. Discuss each one' by mentioning symptoms, consequences and remedial measures. 20
What is genome mapping? Discuss in brief the progress made in
understanding human genome. Provide state-of-the-art information. Discuss
the applicability ..dvantage of exploring genome mapping of plants and
animals. 20

SECTION-B
5. Define and differentiate the following in not more than 150 words each 8x5=40
Polyunsaturated fatty acids {PUFA) and Highly unsaturated fatty acids (HUFA)
Tropomyosin and Troponin
Creatine and Creatinine
Vision and Olfaction in man
Neoteny and Paedogenesis
6. Answer the following
What is meant by teratogenesis? Describe in detail about genetic and environmental teratogenesis. Give suitable examples. 20
What are hormones? Who discovered these and in which year? Provide
a tabulated chart of their classification. Briefly narrate biosynthesis and functions of steroid hormones. 20
7. Answer the following in detail
How are airborne chemicals perceived? Describe the structure and physiology of specific receptors concerned with olfaction in humans. 20
Describe the physiological role of gonadotrophic hormones on puberty and the regulation of menstrual cycle in women. 20
8. Answer the following in detail
Discuss organogenesis of eye with associated sequential steps. Support your answer with diagrams in a tandem manner. 20
Define synapse and different types of synapses. Mention different types of neurotransmitters and their role in synaptic transmission. 20