| 1. | When an allele fails to express itself in F1 generation in the presence of other allele, the former is said to be ? | |
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Epistatic
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Complementary
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Recessive
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Codominant
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Report Question| 2. | Mendel crossed a pure white flowered recessive pea plant with a dominant pure red flowered plant. The first generation of hybrids from the cross should show ? | |
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all white flowered plants
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75% red flowered and 25% red flowered plants
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all red flowered plants
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50% white flowers and 50% red flowers
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| 3. | The process of evolution of a species whereby characteristics which help individual organisms to survive and reproduce are passed on to their offspring and those characteristics which do not help are not passed on is called ? | |
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Speciation
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Natural selection
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Hybridization
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Artificial selection
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| 4. | Identify the two organisms which are now extinct and are studied from their fossils ? | |
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trilobite and white tiger
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ammonite and white tiger
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dinosaur and fish (Knightia)
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white tiger and sparrow
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| 5. | A Trait in an organism is influenced by ? | |
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Maternal DNA only
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Paternal DNA only
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Neither by paternal nor by maternal DNA
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Both maternal and paternal DNA
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| 6. | How life might have originated on earth was experimentally shown by ? | |
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Watson and Crick
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Oparin and Haldane
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Urey and Miller
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None of the above
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| 7. | Mendel was lucky in the choice of the material of his experiments, among the following, which contributed, to his success ? | |
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He considered only one character at one time
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He liked pea plants
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He qualitatively analysed his date
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He observed distinct inherited traits
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| 8. | Which of Mendel's procedures differed from those of his predecessor and contributed most of his success ? | |
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He kept breeding records
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He observed distinct inherited traits
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He observed many characteristics of each trait
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He quantitatively analysed his data
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| 9. | A Yellow and Round seeded pea plant has genotype YyRr. The gametes produced shall be ? | |
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Y, y, R, r
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YR, yR, Yr, yr
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YR, yr
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Yy, Rr
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| 10. | If T is for tallness and t for dwarfness, what shall be the genotype of a tall pea plant according to Mendelism ? | |
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Tt
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Either TT or Tt
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tt
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TT
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