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Home Biotechnology Animal Biotechnology Chromosomes Comments

  • Question
  • In an organism, the chromosome number is maintained constant because of


  • Options
  • A. independent assortment
  • B. crossing over
  • C. DNA duplication
  • D. synapsis

  • Correct Answer
  • DNA duplication 


  • Animal Biotechnology Chromosomes problems


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    • 1. Exchange of segments between non homologous chromosomes is best known as

    • Options
    • A. translation
    • B. translocation
    • C. recombination
    • D. crossing over
    • Discuss
    • 2. Which of the following herbicide is known to be effective against perennial shrubs, annual weeds and weeds of rice?

    • Options
    • A. Cycloheximide
    • B. Anisomycin
    • C. Herbicidin
    • D. Bialaphos
    • Discuss
    • 3. Which of the following is selectively effective against dicot weeds?

    • Options
    • A. Cycloheximide
    • B. Anisomycin
    • C. Herbicidin A and B
    • D. Bialaphos
    • Discuss
    • 4. Inundation involves use of a/an

    • Options
    • A. large number of organisms over a short time to suppress/destroy a population
    • B. organism over a short time to suppress/destroy a population
    • C. large number of organisms over a long time to suppress/destroy a population
    • D. organism over a long time to suppress/destroy a population
    • Discuss
    • 5. Which of the following is known to control Colorado potato beetle?

    • Options
    • A. Beaveria bassiana
    • B. Metarhizium anisopliae
    • C. Verticillium lecauii
    • D. Nomuraea rileyi
    • Discuss
    • 6. How many chromosomes are there in the budding yeast (S. cerevisiae)?

    • Options
    • A. 16
    • B. 17
    • C. 18
    • D. 20
    • Discuss
    • 7. A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as

    • Options
    • A. a physical map
    • B. a genetic map
    • C. a cloning map
    • D. none of these
    • Discuss
    • 8. Hairy wing character of Drosophila is due to

    • Options
    • A. duplication in region of chromosome
    • B. deletion in region of chromosome
    • C. due to presence of additional X-chromosome
    • D. due to a point mutation
    • Discuss
    • 9. A diagram depicting chromosomes of haploid set of an organism ordered in a series of decreasing size is known as

    • Options
    • A. zymogram
    • B. chromogram
    • C. idiogram
    • D. karyogram
    • Discuss
    • 10. Transmission of a gene from male parent to female child to male grand child is known as

    • Options
    • A. holandric inheritance
    • B. quantitative inheritance
    • C. criss-cross inheritance
    • D. maternal inheritance
    • Discuss


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