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Genetics and Plant Breeding

Linkage Practice Questions

20 free Linkage practice questions for the Botany, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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Questions

All Linkage questions

20 questions
  1. Q1. The physical association of two or more genes on the same chromosome is known as:
  2. Q2. Which of the following scientists is credited with the discovery of linkage in Lathyrus odoratus (Sweet Pea)?
  3. Q3. The 'Chromosomal Theory of Linkage' was primarily developed through experiments on Drosophila by:
  4. Q4. In a test cross involving linked genes, the frequency of parental phenotypes in the offspring will be:
  5. Q5. What is the unit of distance used in genetic mapping to represent 1% recombination frequency?
  6. Q6. If two genes A and B show 50% recombination frequency, it indicates that:
  7. Q7. The process that leads to the separation of linked genes is called:
  8. Q8. When two dominant alleles are present on one chromosome and two recessive alleles on the homologous chromosome, the arrangement is called:
  9. Q9. A linkage group corresponds to:
  10. Q10. Who constructed the first genetic map of a chromosome?
  11. Q11. The strength of linkage between two genes is:
  12. Q12. In which stage of meiosis does the physical exchange of segments between chromatids occur?
  13. Q13. If the map distance between genes P and Q is 15 units, and between Q and R is 10 units, what is the map distance between P and R if Q is in the middle?
  14. Q14. Complete linkage is rarely observed because:
  15. Q15. The number of linkage groups in a pea plant (Pisum sativum, 2n=14) is:
  16. Q16. What is the maximum frequency of recombination that can be observed between two genes?
  17. Q17. Interference is a phenomenon where:
  18. Q18. The Coefficient of Coincidence is used to measure:
  19. Q19. Which of the following increases the frequency of crossing over?
  20. Q20. A plant of genotype AB/ab is test-crossed. The progeny consist of 40% AB/ab, 40% ab/ab, 10% Ab/ab, and 10% aB/ab. What is the map distance between A and B?