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Home Biotechnology Animal Biotechnology Chromosomes Comments

  • Question
  • A cross shaped (+) or a ring involving four chromosomes may be formed during metaphase I in case of


  • Options
  • A. translocation heterozygote
  • B. deficiency
  • C. haploid organism
  • D. duplication

  • Correct Answer
  • translocation heterozygote 


  • Animal Biotechnology Chromosomes problems


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    • 1. How does dosage compensation in Drosophila occur?

    • Options
    • A. Hypertranscription of male X chromosome
    • B. Hypotranscription of female X chromosome
    • C. X inactivation in females
    • D. Chimerism
    • Discuss
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. Raphanobrassica is a classical example of

    • Options
    • A. aneuploidy
    • B. nullisomy
    • C. allopolyploidy
    • D. None of the above
    • Discuss
    • 7. The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as

    • Options
    • A. penetrance
    • B. expressivity
    • C. inheritance strength
    • D. environmental influence
    • Discuss
    • 8. Which of the following is correct when a character shows continuous variation assuming a normal distribution?

    • Options
    • A. It is governed by many genes with small cumulative effect
    • B. It is not controlled genetically
    • C. Many of the variation is due to fluctuation of climate
    • D. None of the above
    • Discuss
    • 9. In a dihybrid cross, the progeny of an Fl individual (hetero2ygous for both characters) will show a phenotypic ratio of

    • Options
    • A. 1:1:1:1
    • B. 1:2:2:1
    • C. 9:3:3:1
    • D. 3:1:1:3
    • Discuss
    • 10. Diethyl stilbestrol (DES), a synthetic estrogen causes

    • Options
    • A. chromosome lagging
    • B. disruption of mitotic spindle
    • C. centriole elongation
    • D. all of the above
    • Discuss


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