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Principles of Inheritance and Variation

Board » Bihar Board » Class 12th » English Medium » Science » Biology » L-5 : Principles of Inheritance and Variation

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ID- 2000
BSEB, 2019 (C)

1. The term 'Genetics' was proposed by:

  • (A) Mendel
  • (B) Morgan
  • (C) Beteson
  • (D) Johansen
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ID- 2001
BSEB, 2019 (C)

2. What is the number of chromosomes in Down's syndrome?

  • (A) 46
  • (B) 47
  • (C) 48
  • (D) None of these
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ID- 2002
BSEB, 2019 (C)

3. Triticum aestivum is:

  • (A) Triploid
  • (B) Tetraploid
  • (C) Hexaploid
  • (D) Diploid
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ID- 2093
BSEB, 2020 (A)

4. 'ABO' blood group in human being shows:

  • (A) incomplete dominance
  • (B) multiple allele
  • (C) co-dominance
  • (D) both 'B' & 'C'
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ID- 2094
BSEB, 2018 (C)

5. Which of the following Mendel's Law in not universal?

  • (A) Law of Dominance
  • (B) Law of Segregation
  • (C) Law of Independence Assortment
  • (D) None of these
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ID- 2095
BSEB, 2019 (A)

6. The phenotypic radio for F₂ generation in Incomplete dominance is:

  • (A) 3 : 1
  • (B) 2 : 2
  • (C) 1 : 2 : 1
  • (D) None of these
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ID- 2096

7. Sickle cell is:

  • (A) An autosomal dominant trait
  • (B) Occurrence of Sickle like nucleated RBCs.
  • (C) Change in a single base pair of DNA
  • (D) None of these
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8. Mutation can be induced with

  • (A) Ethylene
  • (B) Gamma radiations
  • (C) Infra-red radiations
  • (D) IAA
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9. Ultimate source of Variation is:

  • (A) Mistosis
  • (B) Meiosis
  • (C) Fertilization
  • (D) Mutations
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ID- 2111
BSEB, 2012

10. What is considered as father of genetics?

  • (A) Hugo de vries
  • (B) Morgan
  • (C) Mendel
  • (D) Darwin
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ID- 2112
BSEB, 2015

11. A person suffering from colour blindness cannot recognise:

  • (A) red and yellow colours
  • (B) red and green colours
  • (C) blue and green colours
  • (D) none of these
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ID- 2113
BSEB, 2019 (C), 2021 (A)

12. Mendel proposed:

  • (A) law of linkage
  • (B) 10% energy law
  • (C) laws of inheritance
  • (D) none of these
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ID- 2114
BSEB, 2020 (A)

13. Turner's syndrome will contain how many chromosomes?

  • (A) 45
  • (B) 46
  • (C) 47
  • (D) None of these
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ID- 2115
BSEB, 2011

14. How many characters were studied many Mendel?

  • (A) Five
  • (B) Four
  • (C) Seven
  • (D) Three
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ID- 2117
BSEB, 2011

15. Mendel selected:

  • (A) Gram
  • (B) Pinus
  • (C) Tomato
  • (D) Garden pea
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ID- 2118
BSEB, 2011, 2021 (A)

16. Law of segregation is also known as:

  • (A) Law of dominance
  • (B) Law of independence assortment
  • (C) law of purity of gametes
  • (D) none of these
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ID- 2169
BSEB, 2015

17. In human blood group AB:

  • (A) antibodies are present
  • (B) antibodies are absent
  • (C) antibody a is present
  • (D) antibody b is present
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ID- 2170

18. Loss of Melanin pigment cause for:

  • (A) Colourblindness
  • (B) Depigmentation
  • (C) Phenyl Ketoneuria
  • (D) Alkaptoneuria
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19. Rh⁺ Individual gene may be:

  • (A) rr
  • (B) TT
  • (C) Rr
  • (D) Both (A) and (C)
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20. Mendal was born in:

  • (A) 17th century
  • (B) 18th century
  • (C) 19th century
  • (D) 8th century
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ID- 2175
BSEB, 2012

21. First geneticist/father of genetics was:

  • (A) de Vries
  • (B) Mendel
  • (C) Darwin
  • (D) Morgan
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22. Mendel's law can be applicable only when:

  • (A) Characters are linked
  • (B) Parents are pure breed
  • (C) F₁ generation in monohybrid cross show 2 type of individuals
  • (D) One pair of contiating characters depends on another pair
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23. An individual with two identical alleles is:

  • (A) Hybrid
  • (B) Dominant
  • (C) Homozygous
  • (D) Heterozygous
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24. A true hybrid condition is:

  • (A) tt Rr
  • (B) Tt rr
  • (C) tt rr
  • (D) Tt Rr
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25. Smallest segment of genetic materials affected by mutation is:

  • (A) Recon
  • (B) Cistron
  • (C) Muton
  • (D) Exon
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26. Genes located on Y-chromosome are:

  • (A) Mutant genes
  • (B) Autosomal genes
  • (C) Holandric genes
  • (D) Sex-linked genes
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ID- 2182

27. A strong mutagen is:

  • (A) Cold
  • (B) Heat
  • (C) Water
  • (D) X-rays
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28. A point mutation is:

  • (A) Thalassemia
  • (B) Sickle-cell anaemia
  • (C) Down's syndrome
  • (D) Nightblindness
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29. Mendel's second law is of the law of:

  • (A) Segregation
  • (B) Dominance
  • (C) Polygenic inheritance
  • (D) Independent assortment
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30. An organism which to unlike genes of a trait is called:

  • (A) Homozygous
  • (B) Heterozygous
  • (C) Both of these
  • (D) None of these
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31. Mendel's laws were discovered by:

  • (A) Correns
  • (B) Tshermak
  • (C) de Vries
  • (D) All of these
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32. Mendel's formulated the law of purity of gametes on the basis of:

  • (A) Test cross
  • (B) Back cross
  • (C) Monohybrid cross
  • (D) Dihybrid cross
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ID- 2188
BSEB, 2010, 2021 (A)

33. Exception of Mendel's law is:

  • (A) Dominance
  • (B) Purity of gametes
  • (C) Linkage
  • (D) Independence assortment
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34. Haemophila is a:

  • (A) Mendelian disorder
  • (B) Chromosomal disorder
  • (C) Can be A or B
  • (D) None of these
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ID- 2191

35. Down's syndrome is a:

  • (A) Mendelian disorder
  • (B) Chromosomal disorder
  • (C) Can be A and B
  • (D) None of these
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36. Punnett to square was developed by:

  • (A) Mendel
  • (B) Watson and Sutton
  • (C) Reginald
  • (D) Boveri
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ID- 2193

37. Mental published his work or in heritance of character in:

  • (A) 1870
  • (B) 1900
  • (C) 1865
  • (D) 1845
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38. .......... pairs of contrasting traits were studied by Mendel in pea plant.

  • (A) 6
  • (B) 7
  • (C) 8
  • (D) 10
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ID- 2196

39. What is the probability of reproduction of dwarf offsprings in a cross between two heterozygous tall pea and plants?

  • (A) Zero
  • (B) 50%
  • (C) 25%
  • (D) 100%
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ID- 2197

40. Inheritance of roan coat in cattle is an example of:

  • (A) incomplete dominance
  • (B) codominance
  • (C) multiple allelism
  • (D) none of these
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41. The character which appear in the first filial generation are called:

  • (A) recessive characters
  • (B) dominant characters
  • (C) holandric characters
  • (D) lethal characters
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ID- 2199

42. Which of the following crosses will give tall and dwarf pea plant in same proportions?

  • (A) TT x tt
  • (B) Tt x tt
  • (C) TT x Tt
  • (D) tt x tt
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ID- 2200

43. Which of the following is a test cross?

  • (A) TT*TT
  • (B) तत्तत्तत्तत्तत्ततिययीयट्ठित्यत्तत्तत्ततियतियट्ठि
  • (C) tt*tt
  • (D) Tt*tt
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ID- 2201

44. Phenotypic and genotypic ratio is similar in case of:

  • (A) complete dominance
  • (B) incomplete dominance
  • (C) over dominance
  • (D) epistasis
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45. How many types of gametes can be produced by a diploid organism who is heterozygous for 4 loci?

  • (A) 4
  • (B) 8
  • (C) 16
  • (D) 32
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46. Law of independent assortment can be explained with the help of:

  • (A) dihlybird cross
  • (B) test cross
  • (C) back cross
  • (D) monohybrid cross
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47. The percentage of ab gamete produced by AaBb parent will be:

  • (A) 25%
  • (B) 50%
  • (C) 75%
  • (D) 12.5%
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ID- 2208

48. Chromosomal theory of inheritance was given by:

  • (A) Morgan et al
  • (B) Sutton and Boveri
  • (C) Hugo de Vries
  • (D) Gregor J. Mendel
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ID- 2209

49. Mendel's work was rediscovered by three scientists in the year:

  • (A) 1865
  • (B) 1900
  • (C) 1910
  • (D) 1920
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ID- 2210

50. Chromosome maps/genetic maps were first prepared by:

  • (A) Sutton and Boveri (1902)
  • (B) Bateson and punnett (1906)
  • (C) Morgan (1910)
  • (D) Sturtevant (1911)
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51. The distance between the genes is measured by:

  • (A) angstrom
  • (B) map unit
  • (C) Donson unit
  • (D) millimetre
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52. Which of the following is suitable for experiment on linkage?

  • (A) aaBB X aaBB
  • (B) AABB X aabb
  • (C) AaBb X AaBb
  • (D) AAbb X AaBB
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53. Grasshopper is an example of XO type of sex determination in which the males have:

  • (A) one X chromosome
  • (B) one Y chromosome
  • (C) two X chromosomes
  • (D) no X-chromosome
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ID- 2214

54. Number of autosomes present in liver cells of a human female is:

  • (A) 22 autosomes
  • (B) 22 pairs
  • (C) 23 autosomes
  • (D) 23 pairs
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ID- 2215

55. Haplodiploidy is found in:

  • (A) grasshoppers and cockroaches
  • (B) birds and reptiles
  • (C) butterflies and moths
  • (D) Honey bees, ants and wasps
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56. Rate of mutation is affected by:

  • (A) temperature
  • (B) X-rays
  • (C) gamma rays
  • (D) all of these
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ID- 2217

57. What are the changes of this couple's child being an albino?

  • (A) 1 in 1
  • (B) 1 in 2
  • (C) 1 in 3
  • (D) 1 in 4
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58. In sickle-cell anaemia, shape of RBCs under oxygen tension becomes:

  • (A) biconcave disc like
  • (B) elongated and curved
  • (C) circular
  • (D) spherical
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ID- 2219

59. In a haemophillic man marries a carrier women then which of the following holds through true for their pregenies?

  • (A) 50% daughters are carrier and 50% are haemophiloc
  • (B) All the daughters are haemophilic
  • (C) All sons are haemophilic and all daughters are normal
  • (D) All sons normal, all daughters carriers
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ID- 2220

60. Mongolism is a genetic disorder which is caused by the presence of an extra chromosome number:

  • (A) 20
  • (B) 21
  • (C) 17
  • (D) 23
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ID- 2221

61. Klinefelter's syndrome is characterized by a karyotype of:

  • (A) XYY
  • (B) XO
  • (C) XXX
  • (D) XXY
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ID- 2222

62. Feamels which Turner's syndrome have:

  • (A) small uterus
  • (B) rudimentary ovaries
  • (C) under developed breasts
  • (D) all of these
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ID- 2223

63. Trisomy is presented by:

  • (A) (2n - 1)
  • (B) (2n - 2)
  • (C) (2n + 2)
  • (D) (2n + 1)
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64. This abnormality occurs due to monosomy (2n - 1); the individual had 2n = 45 chromosomes with 44 XO genotype.

  • (A) Edward's syndrome
  • (B) Down's syndrome
  • (C) Turner's syndrome
  • (D) Klinefelter's syndrome
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ID- 2225

65. A marriage between a colour blind man and a normal woman produces:

  • (A) all carrier daughters and normal sons
  • (B) 50% carrier daughters, 50% normal daughters
  • (C) 50% colour blind song, 50% normal sons
  • (D) all carrier offsprings
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ID- 2226

66. Conditions of a karyotype 2n ≠ 1 and 2n ≠ 2 are called:

  • (A) aneuploidy
  • (B) polyploidy
  • (C) allopolyploidy
  • (D) monosomy
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67. In sickle cell anaemia glutamic acid is replaced by valin. Which one of the following triplets codes for valine?

  • (A) G G G
  • (B) A A G
  • (C) G A A
  • (D) G U G
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ID- 2238

68. In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are:

  • (A) males and females, respectively
  • (B) Females and males, respectively
  • (C) all males
  • (D) all females
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ID- 2239
BSEB, 2020 (A)

69. ZZ/ZW type of sex determination in seen is:

  • (A) platypus
  • (B) snails
  • (C) cockroach
  • (D) peacock
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70. The inheritance pattern of a gene over generation among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to:

  • (A) quantitative trait
  • (B) Mendelian trait
  • (C) polygenic trait
  • (D) maternal trait
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ID- 2245
BSEB, 2016

71. Purine bas on DNA molecule has:

  • (A) A and C
  • (B) C and T
  • (C) A and G
  • (D) none of these
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ID- 2247
BSEB, 2016

72. How many nitrogen base pairs are present in a complete rotation (twist) of B-DNA:

  • (A) 5
  • (B) 10
  • (C) 15
  • (D) 20
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ID- 2249
BSEB, 2016

73. Bacteria has:

  • (A) Plasmid DNA
  • (B) RNA
  • (C) Both 'A' and 'B'
  • (D) None of these
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ID- 2250
BSEB, 2016 (C), 2017 (A), 2017 (C)

74. Which of the following Blood Group is Universal donor?

  • (A) A
  • (B) B
  • (C) AB
  • (D) O
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ID- 2251
BSEB, 2016 (C)

75. 1 : 2 : 1 Ratio is a cross show:

  • (A) Dominance
  • (B) Incomplete Dominance
  • (C) Linkage
  • (D) None of these
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ID- 2253
BSEB, 2017 (A)

76. Which one is phenotypic radio of Monohybrid cross?

  • (A) 1 : 2 : 1
  • (B) 3 : 1
  • (C) 9 : 3 : 3 : 1
  • (D) None
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ID- 2255
BSEB, 2017 (A), 2021 (A)

77. Chromosome number in human being (male) is:

  • (A) 44 xx
  • (B) 44 xy
  • (C) 46 xy
  • (D) 46 xx
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ID- 2256
BSEB, 2017 (A)

78. Inheritance of acquired characters was given by:

  • (A) Drawin
  • (B) Lamarch
  • (C) Devries
  • (D) Haeckel
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ID- 2257
BSEB, 2018 (A)

79. Genes present on same locus having different expre-ssions are called:

  • (A) Multiple allele
  • (B) Polygene
  • (C) Oncogene
  • (D) Codominant gene
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ID- 2259
BSEB, 2018 (A)

80. The human chromosome with highest and least number of genes are:

  • (A) Chromosome 21 and Y
  • (B) Chromosome 1 and X
  • (C) Chromosome 1 and Y
  • (D) Chromosome X and Y
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ID- 2260
BSEB, 2018 (A)

81. Sickle cell anaemia shows:

  • (A) Epistrasis
  • (B) Co-dominance
  • (C) Pleiotropy
  • (D) Incomplete dominance
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ID- 2262
BSEB, 2018 (A)

82. A normal vision female whose father is colour-blind marries a normal vision male. What would be the probability of her sons and daughters to be colour blind?

  • (A) 25% sons colour blind and all daughters with normal vision
  • (B) 50% sons colour blind and 50% daughter normal
  • (C) 50% sons colour blind and 50% daughter colour blind
  • (D) All sons normal and 50% colour blind daughter
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ID- 2263
BSEB, 2017 (C)

83. Chromosome number in human female (Woman) is:

  • (A) 44 XX
  • (B) 44 XY
  • (C) 44 YY
  • (D) None
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ID- 2264
BSEB, 2017 (C)

84. Genotypic Ratio of Monohybrid cross is:

  • (A) 1 : 2 : 1
  • (B) 3 : 1
  • (C) 9 : 3 : 3 : 1
  • (D) None of these
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ID- 2265
BSEB, 2019 (A)

85. Brewery is concerned with:

  • (A) Saccharomyces
  • (B) Protozoans
  • (C) Pteridophytes
  • (D) Marsupials
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ID- 2266
BSEB, 2019 (A)

86. Sickle-cell anemia is related to which type of disease?

  • (A) Sex linked disease
  • (B) Autosomal linked disease
  • (C) Deficiency disease
  • (D) Metabolic disease
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ID- 2267
BSEB, 2019 (A)

87. Lac operon represent:

  • (A) Inducible gene system
  • (B) Repressible gene system
  • (C) Housekeeping gene system
  • (D) All of these
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ID- 2708
BSEB, 2016

88. Human blood group O has:

  • (A) antigen absent
  • (B) antibody absent
  • (C) antigen present
  • (D) antibody A present
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ID- 2724

89. Parson having genotype lA lB would show the blood group as ab this is because of:

  • (A) Pleiotropy
  • (B) co-dominance
  • (C) segregation
  • (D) incomplete dominance
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ID- 2725
BSEB, 2018 (A)

90. A child blood group o has b blood group type father then the father has geno type of:

  • (A) IOIO
  • (B) IOIB
  • (C) IBIB
  • (D) IAIA
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