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  • Question
  • Bar eye character of Drosophila is due to


  • Options
  • A. duplication in region of 16A of X chromosome
  • B. deletion in region of 16A of X chromosome
  • C. due to presence of additional X-chromosome
  • D. due to a point mutation in eye-locus

  • Correct Answer
  • duplication in region of 16A of X chromosome 


  • Animal Biotechnology Chromosomes problems


    Search Results


    • 1. Incase of inversion when the inverted segment of chromosome includes centromere, it is known as

    • Options
    • A. paracentric inversion
    • B. double inversion
    • C. inverted inversion
    • D. pericentric inversion
    • Discuss
    • 2. If two genes show 50% recombination

    • Options
    • A. they are on different chromosomes
    • B. they are on same chromosome but far apart
    • C. both (a) and (b)
    • D. they are closely located on the same chromosome
    • Discuss
    • 3. Which of the following denotes a pair of contrasting characters?

    • Options
    • A. Alleles
    • B. Phenotype
    • C. Homozygous
    • D. Genotype
    • Discuss
    • 4. How many chromosomes are there in Caernorhabditis elegans?

    • Options
    • A. 3
    • B. 6
    • C. 9
    • D. 12
    • Discuss
    • 5. An odd number of cross overs in inverted region will result into formation of a dicentric chromatid and acentric chromatid at anaphase I incase of

    • Options
    • A. pericentric inversion
    • B. paracentric inversion
    • C. double inversion
    • D. none of these
    • Discuss
    • 6. Which of the following begins when pairs of sister chromatids align in the center of the cell?

    • Options
    • A. Anaphase
    • B. Interphase
    • C. Metaphase
    • D. Prophase
    • Discuss
    • 7. Which of the following is not a part of a human chromosome in any phase?

    • Options
    • A. Centriole
    • B. Histone
    • C. Nucleosome
    • D. Centromere
    • Discuss
    • 8. Sequences that correctly describes the cell cycle is

    • Options
    • A. -> G1-> G2 -> S -> mitosis -> cytokinesis ->
    • B. -> S -> G2 -> mitosis -> cytokinesis -> G1 ->
    • C. -> G1 ->S -> G2 -> cytokinesis -> mitosis ->
    • D. ->cytokinesis-> mitosis -> G1 -> S -> G2 ->
    • Discuss
    • 9. The spindle forms in the

    • Options
    • A. G1 phase
    • B. G2 phase
    • C. M phase
    • D. S phase
    • Discuss
    • 10. During which phase, a cleavage furrow is formed in animal cells?

    • Options
    • A. C
    • B. G1
    • C. G2
    • D. M
    • Discuss


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