51. The best example of multiple alleles in humans is:
Answer: B. ABO blood groups
Biology Class 11 Unit 12: Inheritance MCQs
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52. The International Society of Blood Transfusion recognizes up to how many major blood group systems? (as per text)
Answer: C. 30 to 33
53. Blood group systems are characterized by the presence or absence of:
Answer: B. antigens on red blood cell surface
54. The two most significant blood group systems are:
Answer: B. ABO and Rh
55. The ABO blood group system was discovered in 1901 by:
Answer: C. Karl Landsteiner
56. The ABO system is based on how many antigens?
Answer: B. Two (A and B)
57. A blood group with both A and B antigens is:
Answer: C. AB
58. A blood group with neither A nor B antigens is:
Answer: D. O
59. The number of alleles controlling ABO blood groups is:
Answer: B. three (IA, IB and i)
60. Alleles IA and IB are:
Answer: B. co-dominant to each other and dominant over i
61. Genotype IAi produces blood group:
Answer: D. A
62. Genotype IBi produces blood group:
Answer: B. B
63. Genotype ii produces blood group:
Answer: D. O
64. Genotype IAIB produces blood group:
Answer: C. AB
65. Blood group A has ... antibodies in plasma:
Answer: B. anti-B
66. Blood group B has ... antibodies in plasma:
Answer: A. anti-A
67. Blood group AB has ... antibodies:
Answer: D. no anti-A or anti-B
68. Blood group O has ... antibodies:
Answer: C. both anti-A and anti-B
69. Antibodies of the ABO system are produced:
Answer: B. without any stimulus from embryonic life
70. Persons with blood group A can receive blood from:
Answer: C. A and O
71. Persons with blood group B can receive blood from:
Answer: B. B and O
72. AB blood group can receive blood from:
Answer: C. A, B, AB and O
73. The blood group O can receive blood only from:
Answer: D. O
74. The universal donor in ABO system is:
Answer: C. O
75. The universal recipient in ABO system is:
Answer: D. AB
76. The actual universal donor is:
Answer: B. O negative
77. The actual universal recipient is:
Answer: C. AB positive
78. The recessive allele i is more frequent in the population because:
Answer: B. heterozygous carriers cross to produce O group offspring, so the allele persists
79. The Bombay phenotype is due to the absence of the:
Answer: A. H antigen precursor because of hh genotype
80. The H substance is a precursor of:
Answer: B. A and B antigens
81. The Rh blood group was first discovered in:
Answer: B. Rhesus monkey
82. The Rh factor is also called the:
Answer: B. D antigen
83. A person who has Rh antigen is:
Answer: B. Rh positive
84. Genotypes DD and Dd are:
Answer: B. Rh positive
85. Genotype dd is:
Answer: B. Rh negative
86. Anti-Rh antibodies in Rh-negative persons are produced:
Answer: B. only on exposure to Rh antigen
87. Once stimulated, the production of anti-Rh antibodies:
Answer: B. continues throughout life
88. Erythroblastosis foetalis occurs when:
Answer: B. Rh-negative mother carries an Rh-positive foetus
89. In erythroblastosis foetalis the mother's anti-Rh antibodies cross the:
Answer: B. placenta and cause haemolysis of foetal RBCs
90. Haemolytic disease of the newborn causes the foetus to become:
Answer: B. anaemic and jaundiced
91. Yellowing of skin due to accumulation of bilirubin is:
Answer: B. jaundice
92. An erythroblast is a:
Answer: B. nucleated immature red blood cell
93. The first child of an Rh negative mother with an Rh positive foetus is usually:
Answer: B. safe, since antibodies are not yet formed
94. Erythroblastosis foetalis is prevented by giving the mother:
Answer: C. Rh immunoglobulin (RhoGAM)
95. RhoGAM is given to the Rh-negative mother at:
Answer: B. 28 weeks and within 72 hours after delivery of an Rh-positive baby
96. Alternatives to blood transfusion include:
Answer: B. volume expanders, haematopoietic growth factors and erythropoietin
97. Erythropoietin is produced by:
Answer: B. kidneys
98. Erythropoietin stimulates the production of:
Answer: C. red blood cells
99. Traits showing continuous variation are controlled by:
Answer: B. polygenes
100. Polygenic traits include:
Answer: B. height, weight and skin colour
About Biology Class 11 Unit 12 MCQs (Federal Board)
These 228 Biology MCQs cover Class 11 Unit 12: Inheritance of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 5 pages of 50. Use the Print button to save this chapter as a PDF.