1. For self-pollinated crops, the dominance genetic variance in line x tester analysis is equal to:
(2) 2 s 2 sca (2) s 2 sca
(3) 4 s 2 sca (4) s 2 sca/2
(5) 3 s 2 sca
Ans: (2)
2. If n = number of parents and s = sample size of the cross, the number of crosses required for partial diallel analysis can be obtained by the formula ;
(1) ns/2 (2) n(ns)/2
(3) ns (4) 2ns
(5) 2ns/3
Ans: (1)
3. Additive genetic variance arises due to:
(1) Differences between two heterozygotes
(2) Differences between a heterozygote and a homozygote
(3) Differences between two homozygotes
(4) Similarities in two heterozygotes
(5) Other than these options
Ans: (3)
4. First artificial interspecific hybrid was developed by:
(1) R.W. Allard (2) P. H. Harvey (3) Thomas Fairchild (4) R. E. Comstock
(5) Other than these options
Ans: (3)
5. Chromosome numbers usually vary from variety to variety in:
(1) Sugarcane (2) Pea (3) Barley (4) Rye (5) Rice
Ans: (1)
6. A pair of homologous chromosome of different length is called:
(1) Homomorphic bivalent
(2) Heteromorphic bivalent
(3) Bivalent
(4) Zygomorphic bivalent
(5) Pseudomorphic bivalent
Ans: (2)
7. Bridges are seen in:
(1) Paracentric inversion
(2) Pericenttic inversion
(3) In both para & pericentric inversions
(4) Holocentric inversions
(5) Telocentric inversions
Ans: (2)
8. Triticales are the examples of:
(1) Interspecific hybridization
(2) Intergeneric hybridization
(3) Varietal hybridization
(4) Southern hybridization
(5) Northern Crossing
Ans: (2)
9. To plough one hectare of land in the traditional way, a farmer and his animal have to walk:
(1) 50 km (2) 60 km (3) 70 km (4) 80 km (5) 100 Km
Ans: (4)
10. To meet both qualitative and quantitative demand of rice in future, the only option is:
(1) Hybrid rice
(2) Dwarf high yielding rice
(3) Aerobic rice
(4) Designer rice
(5) Golden Rice
Ans: (4)
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