Sex Determination, Linkage And Crossing Over Test

Sex Determination, Linkage And Crossing Over

This is online test 01 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
Sex determination in human being is
  • A
    YY type
  • B
    XXY type
  • C
    XX type
  • D
    XY type
    Correct
2
XO type of sex determination is found in
  • A
    Human beings
  • B
    Elephant
  • C
    Grasshopper
    Correct
  • D
    Dog
3
Hemophilia is more commonly seen in human males than in human females because
  • A
    A greater proportion of girls die in infancy
  • B
    This disease is due to a Y-linked dominant mutation
  • C
    This disease is due to a X-linked recessive mutation
    Correct
  • D
    This disease is due to a Y-linked recessive mutation
4
Female hetrogamety is present in
  • A
    Cockroach
  • B
    Human beings
  • C
    Insects
  • D
    Birds
    Correct
5
What does the chart given below represent?
  • A
    XX - XY type of sex determination
  • B
    XO - XX type of sex determination
  • C
    xy♀ - xx♂ type of sex determination
  • D
    XX - XO type of sex determination
    Correct
6
Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F2 segregation will show:
  • A
    Segregation in the expected 9:3:3:1 ratio
    Correct
  • B
    Segregation in 3:1 ratio
  • C
    Higher number of the recombinant types
  • D
    Higher number of the parental types
7
Henking in 1891 observed a specific nuclear structure in 50% of sperms. He named this structure as
  • A
    Y body
  • B
    Z body
  • C
    XY body
  • D
    X body
    Correct
8
In human beings, if ovum fertilizes with a sperm carrying X-chromosome the zygote develops into
  • A
    Female
    Correct
  • B
    Male
  • C
    Sterile
  • D
    Any of the above
9
In our society women are blamed for producing female children as the growth and development of child occurs inside the mother womb. This statement is
  • A
    incorrect
    Correct
  • B
    Correct
  • C
    Always correct
  • D
    sometimes correct
10
Henking X-body present in 50% of sperms are now known as
  • A
    Y-chromosome
  • B
    Autosomes
  • C
    Lamp brush chromosomes
  • D
    X-chromosome
    Correct