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Linkage

Quiz by savita sharma

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11 questions
Show answers
  • Q1
    Crossing-over takes place in the
    Diakinesis stage (d) Leptotene stage
    Pachytene stage
    Diakinesis stage Leptotene stage
    Anaphase stage
    30s
  • Q2
    There are 4 pairs of chromosomes in a Drosophila. The linkage groups present in it are
    All
    4
    8
    2
    30s
  • Q3
    Percentage of crossing over is more when
    All the above
    linked genes are located far apart from each other
    linked genes are located close to each other
    linked genes are located on different chromosomes
    30s
  • Q4
    Alleles of different genes that are on the same chromosome can occasionally be separated by a phenomenon called
    Crossing over
    Pleiotropy
    Epistasis
    Mutation
    30s
  • Q5
    This is the reason why Mendel did not recognize linkage phenomenon in his experiments
    characters he studied were situated on different chromosomes
    He studied only pure plants
    he did not have a powerful microscope
    characters he studied were situated on same chromosomes
    30s
  • Q6
    When the genes are linked
    Recombinant are more than parentals
    Both points are right
    Recombinants are lesser than parentals
    Both points are wrong
    30s
  • Q7
    Scientist who carried out drosophila experiments
    Sutton and Boveri
    Morgan
    Mendel
    Stuvert
    30s
  • Q8
    In a dihybrid cross test cross result with heterozygous parent will result in
    All are recombinants
    25%ofparentals and 25% recombinants
    All are like parents
    50%of parentals and 50%recombinants
    30s
  • Q9
    In a dihybrid cross if genes are present on same chromosomes and if no crossing over occurs
    50%are like parents and 50%are recombinants
    All progeny are like one parent
    None of the above
    All progeny are like both parents
    30s
  • Q10
    In a dihybrid cross if genes are present on same chromosomes and if crossing over occurs
    Recombinants are equal to 50%
    None
    Recombinants are more than 50%
    Recombinants are lesser than 50%
    30s
  • Q11
    Morgan found following results during his experiment with drosophila
    F2 generation was not 1:2:1
    None of the above
    F2 generation was 9:3:3:1
    F2 generation was not 9:3:3:1
    30s

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