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1. The term Heterosis was coined in 1914 by, , 2., , 3., , (a) Shull (b) East, , (c) Hull (d) Davenport, , The term Hetcrosis was first used by Shull in, , (a) 1908 {b) 1910, , {c) 1914 (d) 1945, , The dominance hypothesis of heterosis was first proposed in 1908 by, (a) East (b) Shull, , {c) Davenport (ad) Hull, , 4, Davenport proposed dominance hypothesis of heterosis in, , {a) 1908 (b) 1914, {c) 1945 (a) 1960

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5., , 7., , 9., , 10., , 11,, , 12., , 13., , 14,, , 15., , 16,, , 17., , 18., , . Dominance hypothesis of heterosis, , Heterosis results due to, (a) Dominance, , (c) Epistasis (b) Overdominance, , (d) All of these., , was supported in 1910 by, (b) Keeble and Pellew, (d) None of these., , {a) Bruce, (c) (a) and (b) above, , The dominance of linked gene hypothesis was proposed in 1917 by, , fe) Dawerport (b) Jones, , ¢) Collins is Shull, Overdominance hypothesis of heterosis was proposed in 1908 by, (a) Shull (b) East, , (c) Bruce (d) East and Shull, , The term overdominance was coined in 1945 by, , {a) Shull (b) Hull, , (c) Jones (d) Bast, , Hull coined the term overdominance in, , (a) 1908 (b) 1910, , (c) 1945 (d) 1950, , Hull coined the term overdominance in 1945 working with, (a) Wheat (b) Maize, , (c) Garden pea (d) Cotton, , Which of the following types of epistasis contributes to heterosis ?, (a) Additive additive (b) Additive dominance, (c) Dominance dominance (d) All of these., , The term useful heterosis was coined in 1972 by, , (a) Shull and East (b) Meredith & Bridge, (c) Mather & Jinks (d) None of these., Meredith and Bridge coined the term useful heterosis in, , (a) 1945 (b) 1954, , (c) 1966 (d) 1972, , Meredith and Bridge coined the term useful heterosis in 1972 working, with —— ;, , (a) Maize arley, , (c) Cotton (d) Sorghum, , Overdominance heterosis is also called as :, , (a) Super dominance (b) Single gene heterosis, , (c) Stimulation of heterozygosis (d) All of these, , Heterosis is estimated over, , (a) Mid parent (b) Better parent, , (c) Best local cultivar (d) All of these., , Which of the following properties of parents affect the magnitude of, heterosis ?, , (a) Genetic diversity, (c) Adaptability, , (b) Genetic base, (d) All of these.

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19., , 20., , 21., , 22., , 23., , 24., , 26., , 27., 28., 29., , 30., , Heterosis can be fixed by, , (a) Asexual reproduction (b) Apromixis, , (c) Polyploidy (d) All of these., , Heterosis over the best commercial cultivar of a locality is called, {a) Mid parent heterosis (b) Heterobeltiosis, , (c) Useful heterosis (d) All of these., , Which of the following terms was coined by Meredith and Bridge i, 1972?, , , , , , (a) Mean heterosis (b) Heterobeltiosis, {c) Useful heterosis (d) None of these., Heterobeltiosis is estimated over, {a) Mid-parent {b) Better parent, (c) Popular variety (d) Popular hybrid, Useful heterosis is estimated over :, (a) Mid parent (b) Popular variety, (c) Better oe (d) Best parent, The —_— == x100 is used for calculation of, (a) Heterobeltiosis (b) Mean heterosis, (c) Useful heterosis (d) Pseudo heterosis, The formula R-& x 100 is used for estimation of, , 1, (a) Useful heterosis (b) Heterobeltiosis, (c) Average heterosis (d) Inbreeding depression, , Which of the following formula is used for estimation of useful, Se, , , , , , , , —w F, -BP, (a) Lx 100 He, Zt =e x 100 (a =F =F 100, , K, , rat of cross pollinated species tends to increase in, (a) Homozygosity (b) Genetic correlation, (c) Genetic diversity (d) All of these., Outbreeding tends to reduction in, (a) Homozygosity (b) Genetic correlation, (c) Genetic variability (d) All of these., Negative heterosis is important for, (a) Earliness (b) Plant height in cereals, (c) Low toxic substances (d) All of these., Heterosis leads to increase in, (a) Yield (b) General vigour, , (c) Adaptation (d) All of these.

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31. Inbreeding leads to reduction in, (a) General vigour (b) Adaptation, (c) Reproductive ability (d) All of these., 32. Across between two inbreds is called, (a) Single cross, (c) Double cross, 33. Highest uniformity is observed ina, (a) Single cross, (c) Double’ cross, 34. An inbred-variety cross is known as, (a) Three way cross, (c) Top Cross, , (b) Three way cross, (d) Multiple cross., , (b) Three-way cross, (d) Multiple cross, , (b) Double cross, , (d) Polycross, , Mating between a single cross and an open pollinated variety is called, (a) Polycross (b) Composite cross, , (c) Top cross (d) Double top cross, , 36. Hetcrosis can be fully exploited in the form of, , (a) Hybrids (b) Composites, ({c) Synthetics (d) Multilines, , 35., , 37. Top cross method for evaluation of inbreds was first suggested in 1927, by, (a) Richey (b) Davis, (c) Jenkins (d) Jones, 38. The cross pollinated species are also called as, (a) Outbreeders, , (b) Allogamous species, (c) (a) and (b) above (d) Autogamous species, Self pollinated species are also termed as :, (a) Autogamous species (b) Inbreeders, (c) (a) and (b) above (d) Allogamous species, 40. Inbreeders have, (a) Selfing (b) Homozygosity, (c) Close adaptation (d) All of these., 41. Out breeders have, , {a) Random mating (b) Heterozygosity, (c) Wide adaptation (d) All of these. —, , he, , 39.