Top cross was first suggested by__________________?

Related Mcqs:

1. Discriminant function of plant selection was suggested by____________________?

   A. Smith (1936)
   B. Yates (1947)
   C. Griffing (1956)
   D. Kempt Horne (1957)

2. Single seed descent method was first suggested by_________________?

   A. Goulden (1939)
   B. Simmonds (1979)
   C. Giber (1953)
   D. Brim (1966)

3. The deficient level of N (%) in plants suggested by various workers is____________________?

   A. 0%
   B. 3%
   C. 5%
   D. 10%

4. The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are____________________?

   A. ECi:<1.5, SAR < 10 & RSC< 2.5
   B. ECi:>1.5, SAR > 10 & RSC> 2.5
   C. ECi:>1.5, SAR 2.5
   D. Both a & b

5. The toxicity level of Zn (mg/kg) in plants suggested by some workers is___________________?

   A. > 50 mg kg-1
   B. > 10 mg-1
   C. > 400 mg kg-1
   D. None of these

6. Concept of biparental mating was developed by__________________?

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

7. Concept of ideotype was coined by__________________?

   A. Oat
   B. Sorghum
   C. Wheat
   D. Rice

8. Linkage of hereditary units was discounted by__________________?

   A. W. Batson and B.C Pun net
   B. T.B. Morgan and G. Mendel
   C. W.S. Sutton and K. R. Porter
   D. C.B. Bridges and G.H. Shull

9. The term cell was introduced in 1665 by__________________?

   A. Maligned
   B. Hook
   C. Schneider
   D. Schumann

10. Gene for gene hypothesis was proposed by__________________?

    A. Nelson (1973)
    B. Flor (1956)
    C. Robinson (1971)
    D. Vander plank (1963)