Chromosomes And Recombination

10 Questions | Total Attempts: 93

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Chromosomes And Recombination

Mccabe lecture on chromosomes and recombination


Questions and Answers
  • 1. 
    Indications for ordering a chromosome analysis include:
    • A. 

      Growth and development abnormalities

    • B. 

      Family history of chromosomal abnormalities

    • C. 

      Infertility, still births, or neonatals death

    • D. 

      Pregnancy with advanced maternal age

    • E. 

      All of the above

  • 2. 
    __________ is any chromosome number other than 46
  • 3. 
    Triploidy is most often due to ________________
  • 4. 
    A complete mole is:
    • A. 

      Diploid and has chromosomes all from paternal origin

    • B. 

      Has a small atrophic fetus

    • C. 

      Contains no fetus or placenta

    • D. 

      Has an extra paternal chromosome set

    • E. 

      A and C only

  • 5. 
    Tetraploidy is always __________ or ____________
  • 6. 
    Aneuploidies are due to ___________________
  • 7. 
    If there are one or more crossovers, then the ratio of non-recombinant: recombinant genotypes will be:
    • A. 

      1:2

    • B. 

      2:1

    • C. 

      1:1

    • D. 

      1:3

    • E. 

      Unknown

  • 8. 
    Genetic linkage analysis is based on:
    • A. 

      PCR and computer analysis

    • B. 

      Probability of meiotic recombination events

    • C. 

      Physical map of the DNA making up the chromosome

    • D. 

      Number of people in a population

    • E. 

      Patchwork inheritance pattern of DNA

  • 9. 
    FISH :
    • A. 

      Detects a specific positions on a chromosome

    • B. 

      Paints whole chromosomes

    • C. 

      Stands for fluorescence in situ hybridization

    • D. 

      A and C

    • E. 

      B and C

  • 10. 
    Possible manifestations of Down Syndrome are
    • A. 

      Transverse palmar crease and flat wide bridge of nose

    • B. 

      Microcephaly, and protruding tongue

    • C. 

      Acute lympocytic leukemia

    • D. 

      A, B, and C

    • E. 

      A and C only