| 1. | The physical manifestation of an organism's genes is its ? | |
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Phenotype
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Genotype
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Environment
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Genetic code
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Report Question| 2. | Blue eye colour in human is recessive to brown eye colour. The expected children of a marriage between blue-eyed woman and brown-eyed male who had a blue-eyed mother are likely to be ? | |
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three blue-eyed and one brown-eyed
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one blue-eyed and one brown-eyed
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all brown-eyed
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all blue-eyed
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| 3. | The number of autosomes in a human body cell is ? | |
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23
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44
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22
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46
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| 4. | Wild cabbage has evolved into new varieties like cabbage, broccoli and cauliflower by ? | |
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reproductive isolation
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artificial selection
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natural selection
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genetic drift
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| 5. | Across between two individuals results in a ratio of 9 : 3 : 3 :1 for four possible phenotypes of progeny. This is an example of a ? | |
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F1 generation
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Test cross
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Monohybrid cross
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Dihybrid cross
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| 6. | A random change in the frequency of alleles in any population over several generations due to errors in the gametes is called ? | |
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Genetic crash
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Genetic error
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Genetic Drift
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Gene flow
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| 7. | If a plant is heterozygous for tallness, the F generation has both tall and dwarf plants. This proves the principle of ? | |
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incomplete dominance
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independent assortment
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segregation
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dominance
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| 8. | When a true breeding tall plant is crossed with a true breeding short plant and the F produced is self pollinated to produce F ratio of true breeding tall and true breeding short plant in F will be ? | |
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1 : 3
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1 : 2
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1 : 1
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2 : 1
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| 9. | Which concept was not included in Charles Darwin’s theory of Natural Selection ? | |
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Overproduction of offspring.
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Survival of the fittest
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Punctuated equilibrium
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Struggle for existence
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| 10. | Those organs which have the same basic structure but different functions are called ? | |
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Analogous organs
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Homologous organs
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Vestigial organs
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None of these
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