Deviation From Mendelism Test

Deviation From Mendelism

This is online test 02 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
A self-fertilizing trihybrid plant forms:
  • A
    8 different gametes and 32 different zygotes
  • B
    8 different gametes and 64 different zygotes
    Correct
  • C
    4 different gametes and 16 different zygotes
  • D
    8 different gametes and 16 different zygotes
2
In the hexaploid wheat, the haploid (n) and basic (X) numbers of chromosomes are
  • A
    n = 21 and X = 7
    Correct
  • B
    n = 21 and X = 21
  • C
    n = 21 and X =14
  • D
    n = 7 and X =21
3
A couple has four daughters. The percentage probability of fifth child to be a Daughter is
  • A
    75
  • B
    50
    Correct
  • C
    10
  • D
    100
4
Incomplete linkage in Drosophila produces off springs with parental and non-parental combinations. What is the percentage of non-parental combination of Drosophila?
  • A
    85 percent
  • B
    17 percent
    Correct
  • C
    83 percent
  • D
    15 percent
5
What will be expected blood groups in the off spring when there is a cross between AB blood group mother and heterozygous B blood group father?
  • A
    25% AB, 25% A, 50%B
    Correct
  • B
    50% AB, 25% A, 25%B
  • C
    25% O, 25% A, 50%B
  • D
    25% AB, 50% O, 25%A
6
Assertion: An organism with lethal mutation may not even develop beyond the zygote stage. Reason: All types of gene mutations are lethal.
  • A
    Both assertion and reason are false
  • B
    Assertion is true statement but reason is false
    Correct
  • C
    Both assertion and reason are true and the reason is the correct explanation of the assertion
  • D
    Both assertion and reason are true but the reason is not the correct explanation of the assertion
7
Which of the following is not a deviation from Medelism?
  • A
    Incomplete dominance
  • B
    Multiple alleles
  • C
    ABO blood grouping
  • D
    Dihybrid cross
    Correct
8
In ABO blood grouping, when gene IA and IB is present together. The blood group of the individual is
  • A
    O
  • B
    AB
    Correct
  • C
    B
  • D
    A
9
Assertion: The cross between red and white flower bearing snapdragon plants results into pink coloured flower. Reason: Incomplete dominance of red and white flower results into pink coloured flower.
  • A
    Assertion is correct but reason is incorrect
  • B
    Both assertion and reason are correct
    Correct
  • C
    Assertion is incorrect but reason is correct
  • D
    Both assertion and reason are incorrect
10
Deviation from Medelism’s occurs due to a. Multiple alleles b. Co dominance c. Linkage and crossing over d. Independent assortment
  • A
    Only a, b and c is correct
    Correct
  • B
    Only b and c are correct
  • C
    All are correct
  • D
    Only b and c is correct