Pure line theory was developed by_______________?

Related Mcqs:

1. If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?

   A. 1:1
   B. 1:2
   C. 2:1
   D. 3:1

2. The concept of multi line varieties was developed by_________________?

   A. Falconer (1960)
   B. Goulden (1939)
   C. Jensen (1952)
   D. Johannsen (1903)

3. Pure water has an water activity (Aw) of___________________?

   A. 0.99
   B. 1.00
   C. 1.5
   D. non of these

4. What is the concentration of pure water?

   A. 55.5 mol/L
   B. 45.5 mol/L
   C. Both a and b
   D. none of these

   Submitted by: Shafiq Rehman

5. Concept of biparental mating was developed by__________________?

   A. Perkins (1968)
   B. Jinks and Jones (1958)
   C. Hayman (1958)
   D. Comstock and Robinson (1948)

6. Concept of triple test cross of analysis was developed by____________________?

   A. Kearsey and Jinks (1960)
   B. Mather (1949)
   C. Anderson (1957)
   D. Fisher (1960)

7. Heat, cold and frost resistance ideotype have been developed in_____________________?

   A. Cereals
   B. Pulses
   C. Millet
   D. None of the above

8. Concept of gene for gene hypothesis was developed in____________________?

   A. Linseed
   B. Oat
   C. Gram
   D. Tomato

9. Many groups of insects have developed resistance to DDT and other insecticides as a result of____________________?

   A. Crossing over
   B. Polyploidy
   C. Segregation
   D. Gene mutation

10. In allogamous species, a true breeding line obtained by continuous inbreeding is__________________?

    A. Hybrid
    B. Top cross
    C. Poly cross
    D. Inbred