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#23 | Sources of Variation: 1
(Zoology) > Evolution
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Related Practice Questions :
Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?
(1) Transduction
(2) Chromosomal aberrations
(3) Genetic drift
(4) Recombination
65%
NEET - 2015
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Many bacteria are now resistant to penicillin, because:
| 1. | penicillin causes gene mutations, some of which are beneficial |
| 2. | previously resistant forms survived and reproduced better than non-resistant forms |
| 3. | the hospital environment inhibits competition among bacteria |
| 4. | penicillin triggers the synthesis of resistant proteins |
74%
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A plant population that reproduces by self - pollination is an extreme example of :
| 1. | the bottleneck effect |
| 2. | the founder effect |
| 3. | rapid gene flow |
| 4. | assortative mating |
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