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IGNOU BZYCT-137 Important Question & Exam Notes ,Top 20 Question of BZYCT-137
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| How is co-dominance different from incomplete dominance? |
| Explain the phenomenon of masking the expression of gene by another in epitasis. |
| Which among the following statements are correct? i) Mitochondria contain 80 S ribosomes. ii) The mRNA encoded by nuclear genes for the smaller subunit of rubisco is translated in the chloroplast. iii) The inheritance of chloroplast genome is independent of nuclear genome. |
| Explain why sterility is common in polyploid organisms? |
| What is trisomy? By what mechanisms does it come into existence? |
| Define mutation. Explain the following types of mutations briefly: (a) Induced mutations (b) Supperessor mutations |
| What are transposable genetic elements? How they can cause mutations? |
| Explain Neo Darwinism and Neo Lamarckism in detail. |
| Industrial melanism is an excellent model to demonstrate the natural selection in action. Analyse the above statement critically. |
| What do you understand by sexual selection. Illustrate your answer with a suitable example |
| What is Isolation and what are its types? Explain. |
| Answer in about 50 words each. a) Explain the concept of geographical isolation with suitable examples. b) How does habitat preference of organisms promote speciation process? c) Cite an example to show that highly restricted breeding seasons of populations contribute to isolation process. d) Discuss the role played by courtship behavior and scents in the isolation process. e) Distinguish the terms interspecifc sterility and hybrid sterility. |
| Analyse the causes and influence of big five mass extinctions. |
| Define the following terms: i) Heterozygous ii) Chromosome mapping iii) Genetic Drift iv) Frame shift mutation v) Dosage compensation |
| Define the following terms: i) Codominance ii) Analogous organ iii) DNA barcoding iv) Mutation |
| Differentiate between the following pairs: i) Sex-limited traits and Sex-influenced traits ii) Somatic mutations and Germinal mutations iii) Sympatric speciation and Allopatric speciation iv) X-Linked traits and Y-Linked traits in Humans v) Monoploidy and Polyploidy vi) Dominant Epistasis and Recessive Epistasis vii) Dihybrid crosses and Trihybrid crosses viii) Inversions and Translocations |
| What is speciation? Explain the mode of speciation. |
| Write a note on the applications of Polyploidy. |
| Explain the natural causes of extinction of a species. |
| Explain the Trisomy 13 – Patau syndrome in detail. |
| Explain in detail the technique used for determining the age of rocks. |
| Write short notes on the following: i) The Down Syndrome ii) Neo-Darwinism iii) Crossing over iv) Possible origin of organelles |
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The Full Form of BZYCT-137 is Genetics and Evolutionary Biology.
it is BSCG Course in BSCG in IGNOU
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