12th Class Biology Principle Of Inheritance And Variation Question Bank

done Assertion and Reason - Principles of Inheritance and Variation Total Questions - 19

• question_answer1)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Offspring have characteristics of both the parents.

  Reason [R] Characters pass from the parents to their progeny.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer2)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] A pair of contrasting characters is termed as allele.

  Reason [R] Two alleles of a gene express equally in an individual.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer3)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] True breeding lines have stable trait inheritance for several generations.

  Reason [R] Mendel conducted cross-pollination experiments on true breeding lines.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer4)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] In \[{{F}_{2}}\]-generation, the traits seen in the progeny were identical to their parents.

  Reason [R] The progeny of the \[{{F}_{2}}\]-generation shows no blending of traits.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer5)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Genes are not passed on from one generation to the next.

  Reason [R] Genes serve as the units of inheritance.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer6)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] During Mendel's investigations into inheritance patterns it was for the first time that statistical analysis and mathematical logic were applied to problems in biology.

  Reason [R] Mendel investigated characters in the garden pea plant that were manifested as two opposing traits, e.g. tall or dwarf plants.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer7)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Gametes receive only one allele of a gene.

  Reason [R] Mitosis occurs during gamete formation leading to the formation of haploid gametes.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer8)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] In codominance, the \[{{F}_{1}}\]-generation resembles both the parents.

  Reason [R] An example is different type of red blood cells that determine ABO blood grouping in humans.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer9)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Starch synthesis in pea seeds is controlled by one gene.

  Reason [R] This gene has two alleles (B and b).

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer10)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] A woman can go to the court if a man refuses to own his child. He has blood group B and woman has A, while child has O.

  Reason [R] Genetically she is right, he can be father of the child.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer11)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] In dihybrid cross, the two pairs of factors are located in two pairs of homologous chromosomes.

  Reason [R] Each chromosome bears two pairs of factors.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer12)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] The linked genes tend to get inherited together.

  Reason [R] The link between them fails to break.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer13)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Morgan carried out several dihybrid crosses in Drosophila to study genes that were sex-linked.

  Reason [R] Morgan hybridised yellow bodies, white eyed males to brown bodied, red-eyed females and intercrossed their F1 progeny.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer14)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] The non-allelic genes for red hair and prickles are usually inherited together.

  Reason [R] The genes for red hair and prickles are located on the same chromosome in close association.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer15)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Insects show female heterogamety.

  Reason [R] In insects, males have XO sex chromosome and females have XX sex chromosome.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer16)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] The mechanism of sex-determination in honeybee is called haplodiploidy.

  Reason [R] Female honeybees are haploid while male honeybees are diploid.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer17)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Haemophilia is a genetically linked disease.

  Reason [R] It is predominantly found in females.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer18)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Colour blindness occurs in about 8 per cent of male and only about 0.4 per cent of females.

  Reason [R] The genes that lead to colour blindness are on the X-chromosome.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer19)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Down's syndrome, Klinefelter's syndrome and Turner's syndrome are chromosomal disorders.

  Reason [R] In Klinefelter's syndrome, females are sterile.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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