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In the 1950s, there were hardly any mosq...

In the 1950s, there were hardly any mosquitoes Delhi. The use of the pesticide DDT on standing water killed their larvae. It is believed that now there are mosquitoes because they evolved DDT resistance through the interaction of mutation and Natural Selection. Pointwise, state in a sequence how that could have happened.

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Certain larvae born with mutation which conferred resistance to DDT: DDT sensitive larvae died, DDT resistant larvae completed life history and became adult mosquitoes: natural selection caused greater reproduction of DDT resistant mosquitoes which soon replaced DDT sensitive mosquitoes.
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TRUEMAN BIOLOGY-GENETICS AND EVOLUTION -SECTION-C
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  2. a) Construct a complete transcription unit with promoter and terminato...

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  3. What is the genetic basis for proof that codon is a triplet?

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  4. Comment on the utility of variability in number of tandem repeats duri...

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  5. Describe the structure of an RNA polynucleotide chain having four diff...

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  6. Why are human females rarely haemophilic? Explain. How do haemophilic ...

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  7. In a maternity clinic, for some reasons the authorities are not able t...

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  8. a) Explain DNA polymorphism as the basis of genetic mapping of human g...

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  9. Explain codominance taking an example of human blood groups in the pop...

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  10. (a) State Hardy Weinberg principle. Name any two factors which affect ...

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  11. "A population has been exhibiting genetic equilibrium". Answer the fo...

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  12. In the 1950s, there were hardly any mosquitoes Delhi. The use of the p...

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  13. Discovery of Lobefins is considered very significant by evolutionary b...

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  14. Study the figure and answer the following (a)Write your observati...

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  15. (a)Rearrange the following in an ascending order of evolutionary tree:...

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  16. (a) What is adaptive radiation. (b) Explain with the help of suitab...

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  17. Study the figures below and answer the following : (a)Mention the sp...

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  18. Branching descent and natural selection are the two key concepts of Da...

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  19. With the help of any two suitable examples explain the effect of anthr...

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  20. Explain the increases in the numbers of melanic(dark winged) moths in ...

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