InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which of the following does not undergo transcription of its genes?A. Barr bodiesB. Polytene chromosomeC. EuchromatinD. Chromosome puff |
| Answer» Correct Answer - A | |
| 52. |
In which type of chromosome, one arms is very long and one arm is very shortA. AcrocentricB. MetacentricC. SubmetacentricD. Telo centric |
| Answer» Correct Answer - A | |
| 53. |
Lampbrush chromosomes are giant chromosomes which are commonly seen inA. Salivary glands of ChironomousB. Salivary glands of DrosophilaC. Oocytes of sharksD. Gametes of Drosophila |
| Answer» Correct Answer - C | |
| 54. |
Polytene chromosome becomes giant due toA. polyploidyB. cancerC. nondisjunctionD. endoduplication |
| Answer» Correct Answer - D | |
| 55. |
The segment of DNA which participates in crossing over is termed asA. ReconB. CistronC. MutonD. Operon |
| Answer» Correct Answer - A | |
| 56. |
A polyploid species having multiple and identical sets of chromosomes is calledA. allopolypoidB. amphidiploidC. anuploidD. autopolypoid |
| Answer» Correct Answer - D | |
| 57. |
In a linear chromosome map, distances between 4 loci is as follows, a-b 10%, a-d 3%, b-c 4% and a-c 6%. The cross over frequency between c and d isA. 0.03B. 0.09C. 3 or 9%D. 4 to 12% |
| Answer» Correct Answer - C | |
| 58. |
Chromosome theory of inheritance was put forward byA. Fleming (1892)B. Sutton and Boveri independently (1902)C. Correns (1909)D. Boveri (1887) |
| Answer» Correct Answer - B | |
| 59. |
Multiple gene inheritance takes into accountA. discontinuous traitsB. continuous traitsC. co-dominanceD. incomplete dominance |
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Answer» Correct Answer - B continuous traits |
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| 60. |
Which gene is connected with multiple phenotypes?A. EpistasisB. PleiotropyC. Polygenic inheritanceD. hypostasis |
| Answer» Correct Answer - B | |
| 61. |
Both father and mother have allele for PKU but are phenotypically normal. What is the probability that their child will have the disease?A. 0.25B. 0.5C. 0.75D. 1 |
| Answer» Correct Answer - A | |
| 62. |
`12:3:1` ratio is due to which type of gene interactionA. dominant epistasisB. recessive epistasisC. supplementary gene intereactionD. complementary gene interaction |
| Answer» Correct Answer - A | |
| 63. |
Selection will not eliminate a lethal recessive gene from a large population becauseA. there are always some heterozygote carriers of the alleleB. gene fixation occurs in populationC. heterozygotes are at a selective advantageD. rate of mutation to the lethal allele is high |
| Answer» Correct Answer - A | |
| 64. |
Rh factor found in man and Rhesus monkey was discovered byA. Landsterinerr annd WeinerB. Willian HarveyC. de castello and sturliD. Rhesus |
| Answer» Correct Answer - A | |
| 65. |
The parents of Triticale (first synthetic man made hybrid plant made by muntzing) are made hybrid plant made by muntzing) areA. wheat & MaizeB. Wheat & ryeC. Barley & ryeD. All of these |
| Answer» Correct Answer - B | |
| 66. |
Which among the following histone proteins is least conserved in course of evolution?A. `H_(4)`B. `H_(3)`C. `H_(2)`D. `H_(1)` |
| Answer» Correct Answer - D | |
| 67. |
The major amino acids in histone protein of chromosomes areA. histidiine and tryptophanB. arginine and lysineC. tyrosine and tryptophanD. cystine and tyrosine. |
| Answer» Correct Answer - B | |
| 68. |
From a cross AABb x aaBb, the genotypes AaBB:AaBb:Aabb,aabb are obtained in ratioA. `1:1:1:1`B. `1:2:1:0`C. `0:3:1:0`D. `1:1:1:0` |
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Answer» Correct Answer - B `1:2:1:0` |
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| 69. |
The Mendelian principles of inheritance were rediscovered byA. Sutton and BoveriB. Hugo de Vries, Tschermak and CorrensC. Lederberg and TatumD. Morgan |
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Answer» Correct Answer - B Hugo de Vries, Tschermak and Correns |
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| 70. |
A modified dihybrid mendelian ratio of 9:3:4 showsA. supplementary genesB. complementary genesC. lethal genesD. duplicate |
| Answer» Correct Answer - A | |
| 71. |
A pleiotropic geneA. is expressed only in primitive plantsB. is a gene evolved during plioceneC. controls a trait only in combination with another geneD. controls multiple traits in an individuals |
| Answer» Correct Answer - D | |
| 72. |
Failure of one gene to express it in the presence of a non-allelic gene is known asA. codominanceB. hypostasisC. incomplete dominanceD. epistasis |
| Answer» Correct Answer - B | |
| 73. |
In complementary gnes, the dihybrid ratio of 9:3:3:1 is modified toA. 0.37986111111111B. `12:3:1`C. `15:1`D. `13:3` |
| Answer» Correct Answer - A | |
| 74. |
A sweet pea plant with blue flowers and long pollens is test crossed. The progeny contains 300 plants with blue flowers and long pollens, 295 plants with red flower and round pollens, 80 plants with blue flower and round pollen and 85 plants with red flower and long pollens. This result is due toA. linkageB. segregationC. independent assortmentD. linkage and crossing over |
| Answer» Correct Answer - D | |
| 75. |
Erythroblastosis foetalis is caused whenA. female is DD & male DdB. femaleis dd & male also ddC. femaleis dd & male DDD. all of the above |
| Answer» Correct Answer - C | |
| 76. |
Grain colourr in wheat is determined by 3 pairs of polygenes. A cross between AABBCC x aabbcc will produce progeny in `F_(2)` in what proportion that is likely to resemble either parent.A. NoneB. One thirdC. Less than 5%D. Half |
| Answer» Correct Answer - C | |
| 77. |
In a random mating population of 1 lac individuals -75,000 individuals were seen to have black eyes (Dominant phenotype), the rest had blue eyes. How many black eyed individuals are hybrid? |
| Answer» Correct Answer - C | |
| 78. |
The genotype of a plant showing the dominant phenotype can be determined by:A. Back crossB. Test crossC. Dihybrid crossD. Pedigree analysis |
| Answer» Correct Answer - B | |
| 79. |
In a breeding experiment between two parents showing the dominant the recessive phenotype of the character the offspring showed equal proportions of the dominant and recessive phenotypes. Which one of following statement must be true?A. Both the parents has equal number of genes for the characterB. Both the parents carried recessive genesC. Both the parents were true breedingD. all are true |
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Answer» Correct Answer - B Both the parents carried recessive genes |
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| 80. |
The term "linkage" was coined byA. Y.H. MorganB. T. BoveriC. G.MendelD. W. Sutton |
| Answer» Correct Answer - A | |
| 81. |
Alleles are:A. true breeding homozygotesB. different molecular forms of a geneC. heterozygotesD. diffeerent phenotypes |
| Answer» Correct Answer - B | |
| 82. |
`Hb^(A) and Hb^(S)` alleles of normal and sickle cell haemoblobin areA. codominant allelesB. multiple allelesC. polygenic allelesD. cumulative alleles |
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Answer» Correct Answer - A codominant alleles |
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| 83. |
Sickle cell anaemia is due to substitution/transversion (point mutation) in whichA. instead of glutamic acid, valine comes at number 6th position in one of `beta` chain of HbB. instead of valine, glutanic acid is inserted at number 6th position of `beta`-chain of HbC. valine is inserted at number 6th position in `alpha` chain of HbD. glutamic acid is substituted by valine at number 6th position of `alpha`-chain of Hb |
| Answer» Correct Answer - A | |
| 84. |
The genotypes of husband and wife are `I^(A)I^(B)` and `I^(A)i`. Among the blood groups of their children how many different genotypes and phenotypes are possibleA. 3 genotypes , 3 phonotypesB. 3 genotypes, 4 phenotypesC. 4 genotypes , 3 phenotypesD. 4 genotypes , 4 phenotypes |
| Answer» Correct Answer - C | |
| 85. |
The association of histone H1 with a nucleosome indicattesA. Transcription is occurringB. DNA replication is occurringC. The DNA is condensed into a chromatin fibre.D. The DNA double helix is exposed. |
| Answer» Correct Answer - C | |
| 86. |
R is dominant red flowerr trait while r is recessive white flower trait. Heterozygous Rr (red) is crossed with homozygous red flowered plant. 64 offspring are produced. Number of white flowered plants is:-A. 64B. 32C. 16D. 0 |
| Answer» Correct Answer - D | |
| 87. |
The ultimate source of variations isA. natural selectionB. sexual reproductionC. mutationsD. hormonal actions |
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Answer» Correct Answer - C mutations |
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| 88. |
A woman has an X-linked condition on one of her X chromosomes . This chromosome can be inherited byA. Both sons and daughtersB. Only grandchildrenC. Only sonsD. Only daughters |
| Answer» Correct Answer - A | |
| 89. |
Which of the following represents an amphidiploid (or allopolyploid) condition?A. A plant having a chromosome number which is not an exact multiple of the haploid numberB. A plant derived by doubling the chromosomes of `F_(1)` hybrid of two speciesC. A polyploid containing genetically different chromosomes sets derived from two or more speciesD. A polyploid species in which the genomes have been derived from the same original species |
| Answer» Correct Answer - A | |
| 90. |
A cross between hybrid and either of any parent is calledA. test crossB. reciprocal crossC. monohybrid crossD. back cross |
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Answer» Correct Answer - D back cross |
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| 91. |
A recessive gene expresses only in homozygous condition. Some times, a single recessive gene can express itself when it isA. autosomal geneB. located on Xchromosome of femaleC. located on X-chromosome of maleD. all of the above |
| Answer» Correct Answer - C | |
| 92. |
Small unstable variations which fluctuate on either side of an average condition are known asA. continuuosB. discontinuousC. blastogenicD. germinal |
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Answer» Correct Answer - A continuuos |
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| 93. |
Seedless watermelons have been obtained throughA. haploidyB. vegetative propagationC. priploidyD. gibberellin application |
| Answer» Correct Answer - C | |
| 94. |
Translocation occurs during spontaneous chromosomal aberrations. During transclocation there isA. an addition of a segment of a chromosome to same chromosomeB. loss of a segment of chromsomeC. transfer of a segment of a chromosome to a different chromosomeD. all of the above |
| Answer» Correct Answer - C | |
| 95. |
In humans , Philadelhia chromosomee is formed by reciprocal translocation between chromosomesA. 9 and 21B. 9 and 22C. 9 and 20D. 20 and 10 |
| Answer» Correct Answer - B | |
| 96. |
Gyanodromorphs appear in Drosophila because ofA. loss of X-chromosomeB. autosomal lossC. mutwationD. gain of Y-chromosome |
| Answer» Correct Answer - A | |
| 97. |
Drosophila is used in the study of genetics becauseA. it is hermephroditeB. generation period is 90-120 simpleC. chromosome complement is simple with three paris of autosomes and XY sex chromosomes where Y chromosome is hookedD. al of the above |
| Answer» Correct Answer - C | |
| 98. |
The fruit fly Drosophila melanogaster was found to be very suitable for expermiental verification of chromosomal theory on inheritanc by Morgan and his coleagues becauseA. it reproduces parthenogeneticallyB. A single mating produces two young fliesC. smaller female is easily recomgnizable from larger maleD. It completes life cycle in about two weeks |
| Answer» Correct Answer - D | |
| 99. |
The ability of certain people to taste the chemical phenylthiocarbamide (PTC) is governed by a dominant allele T, and the inability to taste PTC by its recessive allele t. If 24% of a population is homozygous taster and 40% is heterozygous taster, what is the frequency of t?A. 0.3B. 0.9C. 0.4D. 0.6 |
| Answer» Correct Answer - D | |
| 100. |
In X-linked recessive inheritance, why does the disease gene often appear to skip generations?A. x-linked diseases are only expressed in malesB. All X-linked diseases display incomplete penetranceC. Disease is primarily transmitted through unaffected carrier femalesD. Males with an affected gene may transmit but not show the disease |
| Answer» Correct Answer - C | |