Polygenic And Chromosomal Theroy Of Inheritance Test

Polygenic And Chromosomal Theroy Of Inheritance

This is online test 02 for CBSE class 12 Biology Principles of Inheritance and Variation (Polygenic and chromosomal theroy of inheritance).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Match the following blood group by their possible gynotypes Blood groups 1. A 2. B 3. AB 4. O Possible Genotypes (a) \({I^B}{I^B},{\text{ }}{I^B}i\) (b) ii (c) \({I^A}{I^{A,}}{I^A}i\) (d) \({I^A}{I^B}\)
  • A
    (1 - a) (2 - b) (3 - c) (4 - d)
  • B
    (1 - c) (2 - a) (3 - d) (4 - b)
    Correct
  • C
    (1 - c) (2 - b) (3 - d) (4 - a)
  • D
    (1 - c) (2 - a) (3 - b) (4 - d)
2
Segregation of homologous chromosomes occurs during
  • A
    During mitosis division
  • B
    Gametes formation
    Correct
  • C
    During equational division
  • D
    During gene expression
3
A chromosome with sub-terminal centromere near the middle is called
  • A
    Telocentric
  • B
    Acrocentric
    Correct
  • C
    Metacentric
  • D
    Acentric
4
A phenomenon which works opposite to the linkage is
  • A
    Independent assortment
  • B
    Mutation
  • C
    Crossing over
  • D
    Segregation
    Correct
5
Sutton united the knowledge of chromosomal segregation with Medelian principles and called it the
  • A
    Linkage theory
  • B
    Law of dominance
  • C
    Independent assortment of chromosomes
  • D
    Chromosomal theory of inheritance
    Correct
6
Plotting of specific genes on the chromosome is known as
  • A
    Linkage map only
  • B
    Genetic map only
  • C
    Chromosome map only
  • D
    Chromosome map/linkage map/genetic map
    Correct
7
When two genes are situated very close to one another on a chromosome
  • A
    The percentage of crossing over between them is very high
  • B
    No crossing over can take place
  • C
    Hardly any cross-overs are produced
    Correct
  • D
    Only double cross-over can occur between them
8
XY chromosome that determine the sex in human beings are
  • A
    Both A and B
  • B
    Heterologous
  • C
    Heteromorphic
    Correct
  • D
    Homomorphic
9
Statement I: The bridge between one generation and the next are sperm and ovum. Statement II: Both sperm and ovum contribute equally in heredity. Statement III: Somatic diploid cells possess two chromosomes as well as two mendelian factors of each type.
  • A
    Only statement I and II are correct
  • B
    All three statements are incorrect
  • C
    Only statement II and III are correct
  • D
    All three statements are correct
    Correct
10
Assertion: Chromosomes and genes both occur in pair. Reason: The two alleles of gene pair are located on homologous sites on homologous chromosomes.
  • A
    Assertion and reason both are correct
    Correct
  • B
    Reason is not related to assertion
  • C
    Assertion is correct but reason is incorrect
  • D
    Assertion and reason both are incorrect