Plant Breeding and Genetics Test III


Plant breeding, botony, biology, agriculture related questions and answers for FPSC, PPSC, PMS, CSS, NTS, SPSC and other tests, A complete guide for students and job seekers


Plant Breeding and Genetics Test III

Select one option out of four given options

  1. The outer most part of the plant cell is;





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  3. Linkage groups of the chromosomes are





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  5. The presence of slight differences among the identical twins support the hypothesis that





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  7. One of the following is not advantage of the genetic engineering;





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  9. One of the following is not a technique in hybridization;





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  11. A species or type of plants derived from the doubling of the chromosomes of the F1 hybrid of two known species is known as





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  13. A useful cross for determining the whether an individual is homozygous or heterozygous is;





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  15. Many groups of insects have developed resistance to DDT and other insecticides as a result of;





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  17. Evolution may be described as;





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  19. The off spring of a cross between two individuals different in atleast one set of characters is called;





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  21. Organisms arise into existing form by genetic variation is called





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  23. The mechanism ensuring genetic continuity in mitosis is





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  25. Mendel was lucky to use pea plant for genetic experiments because





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  27. Mitosis is the normal process in living cells but sudden and abnormal mitosis in an organ may some time result in;





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  29. Sexually reproduces organisms contribute to their offsprings





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  31. If two opposite alleles come together and one of the two find expression and mask the other in the body this fact is called;





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  33. If a cell of an organism for two pairs of gene represented by Aa, Bb undergoes meiosis then the possible genotype of the gametes are;





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  35. If a pure tall plant is crossed with dwarf one the ratio of tall with dwarf in F2 after selfing F1 is;





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  37. An auxotroph is





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  39. Polyploidy is most likely to result from;





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  41. A polyploidy species with genome derived from the same original specie is an





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  43. A pheliotropic gene is one which





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  45. All the individuals derived through vegetative propagation from a single individual is known as;





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  47. A genetic element which can exist in more than one of the two alternative forms is known as





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  49. Which of the following probably occur when a diploid cell under goes normal meiotic division





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  51. The smallest unit of recombination in the chromosome is called





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  53. Abnormal cell with random number of chromosome is;





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  55. The functional unit of mutation is;





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  57. A cross of unlike organisms is termed as;





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  59. The genetic constitution of an organism is denoted by





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  61. The physical appearance of an organism is denoted by;





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  63. The cross of hybrid with one of its parent is termed as;





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  65. The cross of hybrid with its recessive parent is termed as;





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  67. Reproduction from an unfertilized egg or reproduction without fertilization may be defined as





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  69. In F2 generation genotypic and phenotypic ratio are identical in case of;





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  71. Theory of mutation was given by;





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  73. As a result of linkage and crossing over





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  75. The term gene was coined by;





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  77. A dihybrid ratio is





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  79. Eugenics refers to;





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  81. The chromosome number of human race is





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  83. When two genes are situated very close together in a chromosome





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  85. Mendel studied contrasting characters for his breeding experiments with the peas, which of the following character he did not study





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  87. The first attempt to show linkage in plants were done in;





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  89. The new crop triticale has been evolved by the;





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  91. A trisomic individual have chromosomal number





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  93. The crossing of homozygous tall plant with the homozygous dwarf plant would yield plants in the ratio of;





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  95. In crop improvement program haploids are of great importance because





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  97. Which feature is not found in all living being;





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  99. Among the following the test cross is





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  101. The mutants which are harmful do not eliminate from the gene pool because





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  103. The primary advantage of sexual over asexual reproduction is;





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  105. Linkage of heredity units was discovered by





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  107. A mutant organism (Bacteria) that will not grow on a minimal medium does so on the addition of some grown factor is known as;





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  109. Rearrangement in which a segment of a chromosome is reversed is known as;





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  111. Absence of chlorophyll in plants is know as





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  113. A spread of genes from one breeding population to another by migration which may result in changes in gene frequency is called





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  115. The role of nucleus in regulating the morphology of the plant was discovered in;





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  117. Pedigree selection is used in





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  119. The gaint chromosome of drosophila is found in;





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  121. Bacteria, single celled animals and plants are grouped together as;





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  123. The protein synthesizing system is associated with





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  125. The enzymes and pigments associated with the photosynthesis are located in;





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  127. From a single ear of a corn a farmer planted 300 kernals which produced 225 tall and 75 short plants the genotype of these off spring are most likely to be;





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  129. As a general rule interbreeding is possible between





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  131. The suppression of a action of gene or group of genes by a gene or genes not allelomorphic to these suppress is known as





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  133. The term cell was introduced in 1665 by





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  135. The carrier of genetic information is;





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  137. The digestive vacuoles in the animal cells are





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  139. Name Chromosome was coined by;





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  141. The nucleic acid comprises of





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  143. Chemically DNA differs from RNA by





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  145. Duplication of chromosome occurs during;





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  147. Electron microscope was invented by





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  149. Who discovered nucleic acid





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  151. Ribosomes are important because they help in;





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  153. Who gave the model of DNA





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  155. Who discovered mitochondria





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  157. Plastids bring about





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  159. The function of the Golgi bodies are;





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  161. Carbohydrates synthesis is carried out by





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  163. The smallest cell organelle so far is;





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  165. Which of the cell organelle rich in catabolic enzymes





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  167. The maximum possible magnification of electron microscope is





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  169. The diameter of mitochondria is





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  171. Liposomes was discovered by;





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  173. In F2 population genotypic and phenotypic ratio are same if;





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  175. Continuous variation are attributed to





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  177. An exception of Mendel's law is





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  179. All organism or cell having chromosome number that is not an exect multiple of basic number is;





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  181. The slow process by which new organisms arise from existing organisms is known as;





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  183. Triticum aestivum is





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  185. Seed is





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  187. If diploid chromosome number in flowering plant is 8 how may chromosome present in synergids





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  189. When a cell having 40 chromosome undergoes meiosis each of the four resulting cells have;





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  191. If a haploid chromosome number of gymnosperm is 12, the chromosome in its endosperm is





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  193. The cell theory was proposed by





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  195. Genetic engineering is





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