| 1. | The maleness of a child is determined by ? | |
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sex is determined by chance
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the cytoplasm of germ cell which determines the sex
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the Y chromosome in zygote
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the X chromosome in the zygote
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Report Question| 2. | The number of pair (s) of sex chromosomes in the zygote of humans is ? | |
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Two
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Four
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One
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Three
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| 3. | The two versions of a trait (character) which are brought in by the male and female gametes are situated on ? | |
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Sex chromosomes
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Any chromosome
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Two different chromosomes
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Copies of the same chromosome
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| 4. | Genotype means ? | |
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Genetic composition of an organ
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Genetic composition of the individual
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Genetic composition of plastids
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Genetic composition of the germ cell
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| 5. | The crossing of a homozygous tall plant with a dwarf would yield F plants in the ratio of ? | |
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all homozygous dwarf
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all homozygous tall
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one homozygous tall, one homozygous dwarf and two heterozygous tall
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two tall and two dwarf
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| 6. | The genotype of a dominant parent is determined by crossing it with the recessive parent. This cross is called ? | |
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out cross
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long cross
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back cross
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test cross
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| 7. | Mendel's laws apply only when ? | |
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First pair of contrasting character is dependent upon other pairs
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Parents are pure breeding
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The character are linked
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F in monohybrid cross shows two types of individuals
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| 8. | Mendel conducted his hybridisation experiment with ? | |
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Pigeon pea
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Wild pea
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Chick pea
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Garden pea
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| 9. | Which of the following may be used to obtain an F2 generation ? | |
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Cross-pollinating two parent plants
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Cross-pollinating an F1 plant with a parent plant
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Allowing flowers on a parent plant to be self-pollinated
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Allowing flowers on an F1 plant to be self-pollinated
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| 10. | Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that ? | |
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birds have evolved from reptiles.
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reptiles have evolved from birds
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feathers are homologous structures in both the organisms
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there is no evolutionary connection between reptiles and birds
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