MCQ on Genetics and Plant Breeding for various Agriculture Exams Part - 1

1. Modified form of bulk method is
(a) Bulk method
(b) SSD method
(c) Mass selection
(d) Pedigree selection

2. Which of the following methods takes longer time for varietal development?
(a) Mass selection
(b) Pedigree method
(c) Bulk method
(d) Back cross method

3. In pedigree breeding after F8, homozygous plants are known as
(a) Variety
(b) Genotype
(c) Strain
(d) Segregants

4. A cross between an inbred line and an open pollinated variety is known as
(a) Back cross
(b) Top cross
(c) Test cross
(d) Wide cross

5. A cross between two inbred lines is called
(a) Poly cross
(b) Test cross
(c) Single cross
(d) Top cross

6. Inbreeding depression is maximum in
(a) Self-pollinated crops
(b) Cross-pollinated crops
(c) Often cross-pollinated crops
(d) Both A and B

7. The term heterosis was first used by
(a) Bruce (1908)
(b) Shull (1914)
(c) Jones (1917)
(d) Hull (1945)

8. The method applicable in both self- and cross-pollinated crops is
(a) SSD
(b) Heterosis breeding
(c) Pedigree selection
(d) Synthetic varieties

9. Which variance is associated with heterosis?
(a) GCA
(b) SCA
(c) Both GCA and SCA
(d) None

10. Which estimates of heterosis is of commercial or practical value?
(a) Relative heterosis
(b) Heterobeltiosis
(c) Economic heterosis
(d) Luxuriance

11. The hybrid is superior to the mid-parent value is called
(a) Reduced heterosis
(b) Standard heterosis
(c) Heterobeltiosis
(d) Relative heterosis

12. The hybrid GCH-7 of castor belongs to which type of hybrid?
(a) Single cross
(b) Double cross
(c) Poly cross
(d) Three way cross

13. The hybrid superior to better parent value is called
(a) Heterobeltiosis
(b) Standard heterosis
(c) Reduced heterosis
(d) Relative heterosis

14. If 10 inbreds are crossed in all possible combinations, then total number of direct cross will be?
(a) 45
(b) 90
(c) 55
(d) 105

15. Which of the following are genetic causes of heterosis?
(a) Dominance
(b) Epistasis
(c) Over-dominance
(d) All of these