Deviation From Mendelism Test

Deviation From Mendelism

This is online test 01 for CBSE class 12 Biology Principles of Inheritance and Variation (Deviation from Mendelism).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
In blood group typing in human, if an allele contributed by one parent is IA and an allele contributed by the other parent is i, the resulting blood group of the offspring will be
  • A
    B
  • B
    A
    Correct
  • C
    O
  • D
    AB
2
Inheritance of skin colour in human being is an example of
  • A
    Monogenic inheritance
  • B
    Mendelian inheritance
  • C
    Polygenic inheritance
    Correct
  • D
    Complementary gene
3
Which of the following is an example of co-dominance?
  • A
    The ABO blood groups in human
    Correct
  • B
    Skin pigmentation in humans
  • C
    Sex-linkage in humans
  • D
    Pink flowers of Snapdragon
4
A human male produces sperms with the genotypes AB ,Ab , aB , ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?
  • A
    AaBB
    Correct
  • B
    AABB
  • C
    AaBb
  • D
    AABb
5
In Mirabilis jalapa when two F1pink flowered plants were crossed with each other, the F2 generation produced 40 red, 80 pink and 40 white flowering plants. This a case of
  • A
    Epistatis
  • B
    Lethal genes
  • C
    Incomplete dominance
    Correct
  • D
    Duplicate genes
6
A person with unknown blood group under ABO system has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend, who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
  • A
    Type B
  • B
    Type A
  • C
    Type O
    Correct
  • D
    Type AB
7
In T. H. Morgan"s Experiment on Drosophilia what will be the result when F1 female flies are crossed with double recessive male files?
  • A
    41.5 % parental combination, 58.5% recombination
  • B
    90 % parental combination, 10% recombination
  • C
    60% parental combination, 40 % recombination
  • D
    83% parental combination, 17% recombination
    Correct
8
ABO blood groups in humans are controlled by the gene I. It has three alleles - IA, IB and i . Since there are 3 different alleles, six different genotypes are possible. How many phenotypes occur?
  • A
    Four
    Correct
  • B
    Three
  • C
    Two
  • D
    One
9
Heterozygous tall plants were crossed with dwarf plants what will be the ratio of dwarf plants in the following progeny?
  • A
    100 percent
  • B
    25 percent
  • C
    75 percent
  • D
    50 percent
    Correct
10
A cross between AaBB X aaBB yields a genotypic ratio of
  • A
    1 AaBB : 1 aaBB
    Correct
  • B
    1 AaBB : 3aaBB
  • C
    3 AaBB : 1 aaBB
  • D
    All AaBb