12th Class Biology Principle Of Inheritance And Variation Question Bank

done Assertion and Reason (MCQs) - Principles of Inheritance and Variation Total Questions - 27

• question_answer1)

  Directions : (1-27)

  In the following questions a statement of assertion followed by a statement of reason is given.

  Choose the correct answer out of the following choices:

  Assertion: Inheritance is the process by which characters are passed from parent to progeny.

  Reason: Variation is the degree by which progeny or offspring differ from their parents.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer2)

  Assertion: During Mendel's investigations into inheritance, it was for the first time that statistical analysis and mathematical logic were applied.

  Reason: Mendel' s approach of using mathematics was unacceptable to many of the biologists of his time.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer3)

  Assertion: Mendel conducted artificial pollination experiments using many true bleeding pea lines.

  Reason: Mendel selected 14 true breeding pea varieties as pairs which were similar except for one character with contrasting traits.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer4)

  Assertion: Round seed of Pea plant is dominant over wrinkled seed.

  Reason: Terminal position of Pea flower is also dominant over axial flower.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer5)

  Assertion: Genes which code for a pair of contrasting traits are known as alleles.

  Reason: Mendel proposed that something was being stably passed down, unchanged from parents to offsprings through gametes.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer6)

  Assertion: Punnet square is developed by a British geneticist C. Punnett.

  Reason: It is graphical representation to calculate the probability of all possible genotypes of offsprings.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer7)

  Assertion: A cross between the \[{{F}_{1}}\] generation and recessive parent is named as test cross.

  Reason: Genotypic ratio of monohybrid test cross is 1 : 2 : 1.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer8)

  Assertion: In a dissimilar pair of factors one member of the pair dominates the other i.e., recessive.

  Reason: Mendelian factors are discrete units and occur in pairs.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer9)

  Assertion: ABO Blood groups in human being is controlled by the gene I.

  Reason: The gene I has three alleles \[{{I}^{A}}\], \[{{I}^{B}}\] and in human being.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer10)

  Assertion: Antirrhinum majos is an example of incomplete dominance.

  Reason: Blood group A of human being depicts co-dominance.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer11)

  Assertion: A gamete contains a single allele for each trait.

  Reason: During gametogenesis, the two alleles of each trait segregate, one passing into each gamete at random.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer12)

  Assertion: In a person with blood group AB, the erythrocytes carry A and B antigen on their surface.

  Reason: The allele \[{{I}^{A}}\] and \[{{I}^{B}}\] that produce AB blood group are codominant and both are expressed.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer13)

  Assertion: In diploid organisms, chromosomes always occur in pairs.

  Reason: Genes are also occurred in pairs in diploid organisms.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer14)

  Assertion: Life span of Drosophila is around 15 days.

  Reason: Male fruit fly is larger than the female.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer15)

  Assertion: In grass hopper, sex is determined by male.

  Reason: In birds, sex is determined by female bird.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer16)

  Assertion: Mutation in the single base pair is referred as point mutation.

  Reason: Deletions and insertions of base pairs of DNA causes frame shift mutation.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer17)

  Assertion: Myotonic dystrophy is an autosomal dominant trait in human being.

  Reason: Sickle cell anaemia is an autosomal recessive trait.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer18)

  Assertion: The heterozygous female i.e., carrier for haemophilia may transmit the disease to sons.

  Reason: The family pedigree of Queen Victoria shows a number of haemophilic decedents as she was a carrier of the disease.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer19)

  Assertion: Gain or loss of a chromosomes is termed as aneuploidy.

  Reason: Increase in a whole set of chromosomes in an organism and this phenomenon is known as polyploidy.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer20)

  Assertion: Palm is broad with characteristics palm crease in Down's syndrome affected individual.

  Reason: Gynaecomastia is the feature of Kline teller's syndrome.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer21)

  Assertion: Single gene can exhibit multiple phenotypic expression is referred as pleiotropic gene.

  Reason: Human skin colour is an example of pleiotropic genes.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer22)

  Assertion: Queen honey bee has 32 chromosomes.

  Reason: Drone honey bee also has 32 chromosomes.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer23)

  Assertion: Plasmids are single stranded extra chromosomal DNA.

  Reason: Plasmids are possessed by eukaryotic cells.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer24)

  Assertion: Organisms lacking one complete chromosome are called monosomic

  Reason: Down's syndrome is an example of monosomy.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer25)

  Assertion: Haemophilia is a sex-linked disease.

  Reason: it is due to presence of a recessive gene on X chromosome.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion, done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer26)

  Assertion: Lethal factors cause death of organism only in homozygous condition.

  Reason: Lethal factors are generally present in recessive state.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow

• question_answer27)

  Assertion: Number of linkage groups in Pisum sativum is 7.

  Reason: Number of linkage groups in an organism is equal to its haploid number of chromosomes.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
  View Solution play_arrow