Sex Determination, Linkage And Crossing Over Test

Sex Determination, Linkage And Crossing Over

This is online test 02 for CBSE class 12 Biology Principles of Inheritance and Variation (Sex determination, linkage and crossing over).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which organism’s male contain a pair of Z chromosome as sex chromosome besides autosomes?
  • A
    Birds
    Correct
  • B
    Lizards
  • C
    Human beings
  • D
    Insects
2
Linkage is the
  • A
    Generation of parental gene combination
  • B
    Physical association of two genes present on same chromosome
    Correct
  • C
    Physical association of two genes present on different chromosome
  • D
    Generation of non-parental gene combination
3
On the basis of sex chromosome shown below, the bird shown is
Question 3 figure 1
  • A
    Male
    Correct
  • B
    Cannot be decided
  • C
    Female
  • D
    Transgender
4
Male heterogamety is present in
  • A
    Tortoise
  • B
    Insects
  • C
    Mammals
    Correct
  • D
    Birds
5
Alfred Sturtevant used the frequency of recombination between genes on same chromosome as measure of the distance between
  • A
    Genes and mapped their position
    Correct
  • B
    All of the above
  • C
    Genes and identified their traits
  • D
    Chromosomes in gametes
6
In our society, female are blamed for producing female children due to
  • A
    Scientific reasons
  • B
    False notation
    Correct
  • C
    Production of same kind of gametes
  • D
    Biological concepts
7
In birds, female has been designed to be the Z and W chromosomes. In these organism female have
  • A
    One Z and two W chromosomes
  • B
    One Z and one W chromosome
    Correct
  • C
    Two Z and 1 one W chromosome
  • D
    One Z and 0 W chromosomes
8
Two genes p and q showing 1.3% of recombination while other two genes x and y show 37.2 percent of recombination. Which pair of genes is close to each other?
  • A
    There is no relation between them
  • B
    Both pairs are equally placed
  • C
    p and q
    Correct
  • D
    x and y
9
Assertion: In human beings, 23 pairs of chromosomes are present in diploid cells. Reason: 22 pairs of chromosomes are equal in male and female but a pair sex chromosome is different in them.
  • A
    Both assertion and reason are correct
    Correct
  • B
    Both assertion and reason are incorrect
  • C
    Assertion is correct but reason do not explain the assertion
  • D
    Assertion is correct but reason is incorrect
10
In XO type of sex determination a. Some sperms bears X-chromosome where as some do not. b. Numbers of male and female chromosomes are equal. c. An egg fertilized by sperms having X-chromosome becomes female.
  • A
    Both “a” and “b” are correct
    Correct
  • B
    Both “b” and “c” are correct
  • C
    Only “b” is correct
  • D
    Only “a” is correct