Inheritance, Variations and Genetics

MDCAT • Biology

91 MCQs — Click "Reveal" to see the correct answer

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  1. 1
    UHS MDCAT 2008

    The colour phenotype of the grain is the sum of individual effects of _ alleles.

  2. 2
    UHS MDCAT 2008

    Position of a gene on the chromosome is called its:

  3. 3
    UHS MDCAT 2008

    The genes of blue opsin are present on:

  4. 4
    UHS MDCAT 2009

    What is true about pattern baldness?

  5. 5
    UHS MDCAT 2017 (Reconduct)

    The process of DNA replication in which each strand acts as a template for new double helix, composed of one parental strand and one newly polymerized strand refers:

  6. 6
    UHS MDCAT 2019

    A person was married to his cousin and both are heterozygous for Sickle Cell anemia. Among their four kids, what will be the proportion of homozygotes?

  7. 7
    UHS MDCAT 2019

    If sequence in DNA is CCCTAGAG, then what would be the sequence in messenger RNA after transcription?

  8. 8
    UHS MDCAT 2019

    If a carrier haemophilic female (XHXh) is married to a haemophilic male (XhY). What will be the ratio of the presence of haemophilia in the children? Select the best answer from the given options.

  9. 9
    UHS MDCAT 2019

    Meselson and Stahl transferred few bacteria grown in N15 medium to N14 medium for replicating their DNA. What would be the result after two rounds of replication?

  10. 10
    UHS MDCAT 2022

    Mode of Inheritance in humans can be traced through:

  11. 11
    UHS MDCAT 2022

    Which one of the following is an X-linked dominant disorder?

  12. 12
    UHS MDCAT 2022

    To study sex linkages in Drosophila, Morgan mated white eyed males with wild type red eyed females. What will be the phenotye of offspring?

  13. 13
    UHS MDCAT 2022

    DNA stores biological information in discrete units termed as:

  14. 14
    UHS MDCAT 2022

    What happens when a Rh -ve woman, married to a Rh +ve man conceivesa child who is Rh +ve?

  15. 15
    UHS MDCAT 2023

    Only those genes can assort independently whose loci are on:

  16. 16
    UHS MDCAT 2023

    Which one of the following is X Linked Dominant disorder?

  17. 17
    UHS MDCAT 2023

    To study sex linkages in Drosophila, Morgan mated white eyed males with wild type red eyed females. What will be the phenotype of offspring?

  18. 18
    UHS MDCAT 2023 UHS MDCAT 2022

    Test cross is made to check the genotype of a trait. Which of the following crosses is a test cross?

  19. 19
    UHS MDCAT 2023

    According to Mendel Law of Segregation, the one individual out of four in F2 generation had phenotype that failed to express in generation.

  20. 20
    UHS MDCAT 2023

    ABO blood group is controlled by more than two alleles in a population. This shows that ABO blood group is an example of:

  21. 21
    UHS MDCAT 2024

    The chromosomes was first observed by:

  22. 22
    UHS MDCAT 2024

    Chromosomal abnormality in Turner syndrome is represented by?

  23. 23
    PMDC MDCAT 2025

    If a normal person marries with colour blind female what will be the possibility of normal male child:

  24. 24
    PMDC MDCAT 2025

    A baby girl is born with hemophilia, which is an X-linked recessive disorder. What are the most likely genotypes of her parents?

  25. 25
    PMDC MDCAT 2025

    Which of the following is the correct higher (left) to lower (right) sequence of molecules involved in the flow of genetic information in the cell?

  26. 26
    PMDC MDCAT 2025

    Mendel crossed a plant with round yellow seeds (RRYY) and was a plant with wrinkled green seeds (rryy), what was the phenotype of all F1 offspring?

  27. 27
    PMDC MDCAT 2025

    In a pea plant seed color is determined by one gene, with yellow (dominant) and green (recessive). Which parental cross would most likely result in offspring showing a 1:1 ratio of yellow to green seeds?

  28. 28
    PMDC MDCAT 2025

    What is the function of a centromere?

  29. 29
    PMDC MDCAT 2025

    Total number of linkage groups in a normal human is:

  30. 30
    PMDC MDCAT 2025

    Best description of the process of crossing over during meiosis:

  31. 31
    PMDC MDCAT 2025

    The 9.3.3.1 ratio of law of Independent assortment can be affected by:

  32. 32
    The possible causes of divergence according to Darwin are:
  33. 33
    Which is not an evidence of evolution from embryology?
  34. 34
    All can be used as evidence of evolution from Biochemistry except:
  35. 35
    Divergent evolution leads to:
  36. 36
    Lamarckism is not considered the best theory for evolution due to:
  37. 37
    Loss of limbs of snakes due to crawling and concealing habits is an example of:
  38. 38
    A gene with multiple phenotypic effects is called:
  39. 39
    It is a polymorphic gene
  40. 40
    When a gene suppresses the effect of another gene at another locus, the phenomenon is termed as
  41. 41
    Multiple alleles are the alleles that are always
  42. 42
    Which amino acid is found abnormally in sickle cell hemoglobin at position 6
  43. 43
    It is an example of chromosomal aberration
  44. 44
    Pattern baldness in male is
  45. 45
    Genes of these traits are present in both male and female but expressed in only one due to differences
  46. 46
    It is an androgen insensitivity syndrome
  47. 47
    It passes directly from father to son:
  48. 48
    A person can differentiate between colours due to presence of normal:
  49. 49
    Albinism is a ______ trait:
  50. 50
    It is an autosomal recessive trait:
  51. 51
    It is an example of X-Linked dominant trait:
  52. 52
    In humans, sex of an individual depends upon:
  53. 53
    Y chromosome in humans is:
  54. 54
    How many chromosomes in humans are similar in both male and female?
  55. 55
    According to Darwin, finches found on the Galapagos Island had distinct characteristics due to:
  56. 56
    According to Lamarck, evolution is the result of:
  57. 57
    In fishes, gill pouches develop into:
  58. 58
    The oldest known fossils are of:
  59. 59
    These are the products of evolution:
  60. 60
    UHS MDCAT 2013
    The structures which are reduced during the course of evolution and have no apparent function are called:
  61. 61
    Darwin suggested that populations of individual species become better adapted to their environment through:
  62. 62
    In Lamarckism, we now know that:
  63. 63
    First comprehensive theory of evolution was proposed by:
  64. 64
    The gene which controls conversion of tyrosine into melanin:
  65. 65
    All of followings are quantitative traits In man except:
  66. 66
    Which of the followings Is not related with qualitative traits?
  67. 67
    Phenotypes are the results of:
  68. 68
    A person is having antigens A and B in its blood but its blood group IS O. The genotype Of that person
  69. 69
    Genes for ABO blood group are on chromosome _____ while Its epistatic gene H located on _____ chromosome
  70. 70
    Production of antigen A and B depends upon:
  71. 71
    Inter-genic interactions are among:
  72. 72
    An erythroblast is a precursor of:
  73. 73
    Chances of maternal-foetal Rh incompatibility is most at:
  74. 74
    Secretor gene 'Se' is present on chromosome:
  75. 75
    Which of the following diseases is caused due to D antigen incompatibility?
  76. 76
    Which of the following is not a rare blood type?
  77. 77
    The time at which expression of alleles of gene I occurs:
  78. 78
    Phenomenon of co-dominance is present in blood group:
  79. 79
    Gene-I is:
  80. 80
    Organisms with blood group O can donate blood to any other ABO blood group but can receive from O because of having:
  81. 81
    If a gene has 500 alleles, then there are how many alleles that can be present in a single individual?
  82. 82
    Multiple alleles concept arise when there are at least ____ phenotypes observed:
  83. 83
    More intense heterozygous than homozygote is observed in:
  84. 84
    The dominance relationship having same genotype and phenotype ratios in F2:
  85. 85
    Mendelian inheritance deals with:
  86. 86
    9:3:3:1 in Mendel's dihybrid cross is:
  87. 87
    If both parents are heterozygous for a trait then what will be the chances of heterozygous offspring according to product rule?
  88. 88
    Which of the following is also called as law of purity of gametes?
  89. 89
    The units of inheritance were named as ______ by Mendel.
  90. 90
    Albinism is due to lack of:
  91. 91
    Select the Mendelian monohybrid genotypic ratio in F2 generation