Principles of Inheritance & Variation PYQs Set 3 (PDF)

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Mere Teacher · Previous Year Questions NEET Biology · Principles of Inheritance & Variation · Set 3 (Q61-90)
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61. $In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F_{1} generation, pink flowers were obtained. When pink flowers were selfed, the F_{2} generation showed white, red and pink flowers. Choose the incorrect statement from the following :$ (1) $This experiment does not follow the Principle of Dominance$ (2) $Pink colour in F_{1} is due to incomplete dominance.$ (3) $Ratio of F_{2} is 1/4 (Red) : 2/4 (Pink) : 1/4 (White)$ (4) $Law of Segregation does not apply in this experiment.$ 62. $The production for gametes by the parents, formation of zygotes, the F_{1} and F_{2} plants, can be understood from a diagram called:$ (1) $Punch square$ (2) $Punnett square$ (3) $Net square$ (4) $Bullet square$ 63. $Which of the following is incorrect combination?$ (1) $XO-type sex determination-Grasshopper$ (2) $XY-type sex determination-Drosophila$ (3) $ZW-type sex determination-Pavo$ (4) $X-body-Morgan$ 64. $In which mode of inheritance do you expect more maternal influence among the offspring?$ (1) $Autosomal$ (2) $Cytoplasmic$ (3) $Y-linked$ (4) $X-linked$ 65. $Which one from those given below is the period for Mendel's hybridization experiments?$ (1) $1840 - 1850$ (2) $1857 - 1869$ (3) $1870 - 1877$ (4) $1856 - 1863$ 66. $Chromosomal theory of inheritance was proposed by:$ (1) $Bateson and Punnett$ (2) $T.H. Morgan$ (3) $Watson and Crick$ (4) $Sutton and Boveri$ 67. $If both parents are carriers for thalessemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?$ (1) $No chance$ (2) $50%$ (3) $25%$ (4) $100%$ 68. $A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4 then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?$ (1) $0.36 (AA); 0.48(Aa); 0.16 (aa)$ (2) $0.16 (AA); 0.24 (Aa); 0.36 (aa)$ (3) $0.16 (AA); 0.48 (Aa); 0.36 (aa)$ (4) $0.16 (AA); 0.36 (Aa); 0.48 (aa)$ 69. $A normal-visioned man whose father was colour blind, marries a women whose father was also colour blind. They have their first child as a daughter. What are the chances that this child would be colour blind?$ (1) $100%$ (2) $0%$ (3) $25%$ (4) $50%$ 70. $In a marriage between male with blood group A and female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of parents?$ (1) $I^{A} i (Male) : I^{B} I^{B} (Female)$ (2) $I^{A} I^{A} (Male) : I^{B} I^{B} (Female)$ (3) $I^{A} I^{A} (Male) : I^{B} i (Female)$ (4) $I^{A} i (Male) : I^{B} i (Female)$ 71. $A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?$ (1) $1$ (2) $Nil$ (3) $0.25$ (4) $0.5$ 72. $If two persons with ‘AB’ blood group marry and have sufficiently large number of children, these children could be classified as ‘A’ blood group : ‘AB’ blood group : ‘B’ blood group in 1 : 2 : 1 ratio. Modern technique of protein electrophoresis reveals the presence of both ‘A’ and ‘B’ type proteins in ‘AB’ blood group individuals. This is an example of$ (1) $Codominance$ (2) $Incomplete dominance$ (3) $Partial dominance$ (4) $Complete dominance$ 73. $A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their off springs ?$ (1) $A,B and AB only$ (2) $A,B,AB and O$ (3) $O only$ (4) $A and B only$ 74. $A human male produces sperms with the genotypes AB, Ab, aB, and ab, in equal proportions. What is the corresponding genotype of this person :-$ (1) $AaBb$ (2) $AaBB$ (3) $AABb$ (4) $AABB$ 75. $If a colourblind woman marries a normal visioned man, their sons will be -$ (1) $All normal visioned$ (2) $One-half colourblind and one-half normal$ (3) $Three-fourths colourblind and one- fourth normal$ (4) $All colourblind$ 76. $In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F_{1} generation :-$ (1) $50 : 50$ (2) $9 : 1$ (3) $1 : 3$ (4) $3 : 1$ 77. $Which of the following pairs in wrongly matched?$ (1) $Starch synthesis in pea : Multiple alleles$ (2) $ABO blood grouping : Co-dominance$ (3) $XO type sex determination: Grasshopper$ (4) $T.H. Morgan : Linkage$ 78. $ABO blood groups in humans are controlled by the gene I. It has three alleles - I^{A}, I^{B} and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?$ (1) $Four$ (2) $Two$ (3) $Three$ (4) $One$ 79. $In Drosophila, the genes for color of body and color of eyes are situated on _________.$ (1) $autosomes$ (2) $Y-chromosome$ (3) $X-chromosome$ (4) $both the sex chromosomes$ 80. $What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?$ (1) $Turner's syndrome$ (2) $Klinefelter's syndrome$ (3) $Edward syndrome$ (4) $Down's syndrome$ 81. $ABO blood grouping is controlled by gene I which has three alleles and show co-dominance. There are six genotypes. How many phenotypes in all are possible?$ (1) $Six$ (2) $Three$ (3) $Four$ (4) $Five$ 82. $How many different kinds of gametes will be produced by a plant having the genotype AABbCC?$ (1) $Three$ (2) $Four$ (3) $Nine$ (4) $Two$ 83. $A normal visioned man whose father was colour-blind marries a woman whose father was also colour blind. They have their first child as a daughter. What are the chances that this child would be colourblind?$ (1) $25%$ (2) $50%$ (3) $100%$ (4) $Zero percent$ 84. $How many pairs by contrasting characters in pea plants was studied by Mendel in his experiments?$ (1) $5$ (2) $6$ (3) $8$ (4) $7$ 85. $F_{2} generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of:-$ (1) $Monohybrid cross with complete dominance$ (2) $Monohybrid cross with incomplete dominance$ (3) $Co-dominance$ (4) $Dihybrid cross$ 86. $A low frequency recombination indicates that the genes are :$ (1) $Located close to each other$ (2) $Not linked$ (3) $Present on different chromosomes$ (4) $Located far apart from each other$ 87. $F_{2} generation in a Mendelian cross showed that both genotypic and phenotypic rations are same as 1 : 2 : 1. It represents a case of$ (1) $Co-dominance$ (2) $Dihybrid cross$ (3) $Monohybrid cross with complete dominance$ (4) $Monohybrid cross with incomplete dominance$ 88. $In artificial hybridisation, which of the following phenomenon is not required for the female parent?$ (1) $Emasculation$ (2) $Bagging$ (3) $Dusting of pollen grains (pollination)$ (4) $Rebagging$ 89. $An abnormal human baby with ‘XXX’ sex chromosomes was born due to$ (1) $Formation of abnormal sperms in the father$ (2) $Formation of abnormal ova in the mother$ (3) $Fusion of two ova and one sperm$ (4) $Fusion two sperms and one ovum$ 90. $In a testcross involving F_{1} dihybrid flies, more parental-type offspring were produced the recombinant-type offspring. This indicates:$ (1) $The two genes are located on two different chromosomes$ (2) $Chromosomes failed to separate during meiosis$ (3) $The two genes are linked and present on the same chromosome$ (4) $Both of the characters are controlled by more than one gene$