Self Studies

Principles of I...

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  • Question 1
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion (A) : ABO blood group in human being is an example of multiple allelism.

    Reason (R) : It has three alleles for the gene 1 i.e. IA, IB, i.

  • Question 2
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Test cross is a back cross.

    Reason : In test cross, individual is crossed with recessive parent.

  • Question 3
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion (A) : Cross of F1 individual with recessive homozygous parent is test cross.

    Reason (R) : No recessive individual are obtained in the monohybrid test cross progeny.

  • Question 4
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Complementary genes are non-allelic genes.

    Reason : Complementary genes interact to produce a completely new trait.

  • Question 5
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion: Gametes receives only one allele of a gene.

    Reason: During gamete formation, mitosis takes place leads to formation of haploid cells.

  • Question 6
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : A gene may have several allelomorphs.

    Reason: Wild form can mutate in more than one ways.

  • Question 7
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : A pair of contrasting characters is termed as allele.

    Reason : Only one gene of an allele is expressed in an individual.

  • Question 8
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion: Pure lines are called true breed.

    Reason : True breeds are used for cross breeding.

  • Question 9
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion: The cross between the F1 progeny and either of the parent types is a test cross.

    Reason: The cross between F1 progeny and the double recessive genotype is back cross.

  • Question 10
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : Mendel was successful in his hybridization.

    Reason : Garden pea proved ideal experimental material.

  • Question 11
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion: In monohybrid cross, at F2 stage, both parental traits are expressed in 3 : 1 proportion.

    Reason: At F2 stage, the contrasting parental traits show blending.

  • Question 12
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion: Mendel used true-breeding pea lines for artificial pollination experiments for his genetic studies.

    Reason: For several generations, a true-breeding line shows the stable trait inheritance and expression.

  • Question 13
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion : In a monohybrid cross, F1 generation indicate dominant characters.

    Reason : Dominance occurs only in heterozygous state.

  • Question 14
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion: On true breeding lines, Mendel conducted cross pollination experiments.

    Reason: For several generations, true breed line have stable trait inheritance.

  • Question 15
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    Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion: Genes pass from one generation to another.

    Reason: The unit of inheritance are genes.

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