Samacheer Kalvi EM 12 Bio - Botany Unit7 Chapter2 MCQs Mock Test

12th Bio - Botany Mock Test

Chapter 2: Classical Genetics

Choose the correct answer from the multiple choices, then click "Next" to goto next question and click "OK" after seeing the score.

 

1. Extra nuclear inheritance is a consequence of presence of genes in
   1.   Mitrochondria and chloroplasts
   2.   Endoplasmic reticulum and mitrochondria
   3.   Ribosomes and chloroplast
   4.   Lysosomes and ribosomes
2. In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype
   1.   aaBB
   2.   AaBB
   3.   AABB
   4.   aabb
3. How many different kinds of gametes will be produced by a plant having die genotype AABbCC?
   1.   Three
   2.   Four
   3.   Nine
   4.   Two
4. Which one of the following is an example of polygenic inheritance?
   1.   Flower colour in Mirabilis Jalapa
   2.   Production of male honey bee
   3.   Pod shape in garden pea
   4.   Skin Colour in humans
5. In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F₂ generation of the cross RRYY x rryy?
   1.   Only round seeds with green cotyledons
   2.   Only wrinkled seeds with yellow cotyledons
   3.   Only wrinkled seeds with green cotyledons
   4.   Round seeds with yellow cotyledons an wrinkled seeds with yellow cotyledons
6. Test cross involves
   1.   Crossing between two genotypes with recessive trait
   2.   Crossing between two F₁ hybrids
   3.   Crossing the F₁ hybrid with a double recessive genotype
   4.   Crossing between two genotypes with dominant trait
7. In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seed pant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in generation?
   1.   9:3
   2.   1:3
   3.   3:1
   4.   50:50
8. The genotype of a plant showing the dominant phenotype can be determined by
   1.   Back cross
   2.   Test cross
   3.   Dihybrid cross
   4.   Pedigree analysis
9. Select the correct statement from the ones given below with respect to dihybrid cross
   1.   Tightly linked genes on the same chromosomes show very few combinations
   2.   Tightly linked genes on the same chromosomes show higher combinations
   3.   Genes far apart on the same chromosomes show very few recombinations
   4.   Genes loosely linked on the same chromosomes show similar recombinations as the tightly I linked ones
10. Which Mendelian idea is depicted by a cross in which the F₁ generation resembles both the parents
    1.   Incomplete dominance
    2.   Law of dominance
    3.   Inheritance of one gene
    4.   Co-dominance
11. Fruit colour in squash is an example of
    1.   Recessive epistasis
    2.   Dominant epistasis
    3.   Complementary genes
    4.   Inhibitory genes
12. In his classic experiments on Pea plants, Mendel did not use
    1.   Flowering position
    2.   Seed colour
    3.   Pod length
    4.   Seed shape
13. The epistatic effect, in which the hybrid cross 9:3:3:1 between AaBb Aabb is modified as
    1.   Dominance of one allele on another allele of both loci
    2.   Interaction between two alleles of different loci
    3.   Dominance of one allele to another alleles of same loci
    4.   Interaction between two alleles of some loci
14. In a test cross involving F₁ dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates
    1.   The two genes are located on two different chromosomes
    2.   Chromosomes failed to separate during meiosis
    3.   The two genes are linked and present on the some chromosome
    4.   Both of the characters are controlled by more than one gene
15. The genes controlling the seven pea characters studied by Mendel are known to be located on h6w many different chromosomes?
    1.   Seven
    2.   Six
    3.   Five
    4.   Four
16. Which of the following explains how progeny can posses the combinations of traits that none of the parent possessed?
    1.   Law of segregation
    2.   Chromosome theory
    3.   Law of independent assortment
    4.   Polygenic inheritance
17. “Gametes are never hybrid”. This is a statement of
    1.   Law of dominance
    2.   Law of independent assortment
    3.   Law of segregation
    4.   Law of random fertilization
18. Gene which suppresses other genes activity but does not lie on the same locus is called as
    1.   Epistatic
    2.   Supplement only
    3.   Hypostatic
    4.   Codominant
19. Pure tall plants are crossed with pure dwarf plants. In the F₁ generation, all plants were tall. These tall plants of generation were selfed and the ratio of tall to dwarf plants obtained was 3:1. This is called
    1.   Dominance
    2.   Inheritance
    3.   Codominance
    4.   Heredity
20. The dominant epistatis ratio is
    1.   9:3:3:1
    2.   12:3:1
    3.   9:3:4
    4.   9:6:1
21. Select the period for Mendel’s hybridization experiments
    1.   1856 – 1863
    2.   1850 – 1870
    3.   1857-1869
    4.   1870 – 1877
22. Among the following characters which one was not considered by Mendel in his experimentation pea?
    1.   Stem – Tall or dwarf
    2.   Trichomal glandular or non-glandular
    3.   Seed – Green or yellow
    4.   Pod – Inflated or constricted

Samacheer Kalvi EM 12th Std Bio - Botany Unit 7 Chapter 2 MCQs Mock Test Instructions

Chapter 2: Classical Genetics

Here you will find 22 MCQs questions and options. Read the questions carefully and select the appropriate answer for the question by selecting/clicking the box before the option. A pop-up box will open by displaying the result of the option selected. The result of each question will be based on percentages. Each question will have 3 chances to select the right option and for every chance, the percentage of scores will be reduced. Likewise, the remaining questions also take place. The overall percentage scored will be displayed at the completion of the mock test.

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