Botany - Classical Genetics Model Question Paper

12th Standard EM

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Biology

Time : 02:00:00 Hrs
Total Marks : 50
    7 x 1 = 7
  1. How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

    (a)

    Three

    (b)

    Four

    (c)

    Nine

    (d)

    Two

  2. 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 F1 generation?

    (a)

    9:1

    (b)

    1:3

    (c)

    3:1

    (d)

    50:50

  3. The genotype of a plant showing the dominant phenotype can be determined

    (a)

    Back cross

    (b)

    Test cross

    (c)

    Dihybrid corss

    (d)

    Pedigree analysis

  4. Fruit colour in squash is an example of

    (a)

    Recessive epistatsis

    (b)

    Dominant epistasis

    (c)

    Complementary genes

    (d)

    Inhibitory genes

  5. The genes controlling the seven pea characters studied by Mendel are known to be located on how many different chromosomes?

    (a)

    Seven

    (b)

    Six

    (c)

    Five

    (d)

    Four

  6. Pure tall plants are crossed with pure dwarf plants. In the F1 generation, all plants were tall. These tall plants of F1 generation were selfed and the ratio of tall to dwarf plants obtained was 3:1. This is called

    (a)

    Dominance

    (b)

    Inheritance

    (c)

    Codominance

    (d)

    Heredity

  7. The term 'Genetics' was introduced by__________

    (a)

    Gregor Mendel

    (b)

    Bateson

    (c)

    Hugo de Vries

    (d)

    Carl Correns

  8. 6 x 1 = 6
  9. Seed shape

  10. (1)

    Inflated / Constricted

  11. Pod shape

  12. (2)

    Seed capsule in xxxxx

  13. Supplementary genes

  14. (3)

    Round / wrinkled

  15. Duplicate genes

  16. (4)

    Grain color in maize

  17. Supplementary genes

  18. (5)

    15:1

  19. Duplicate genes

  20. (6)

    9:3:4

    6 x 2 = 12
  21. Name the seven contrasting traits of Mendel.

  22. Give the names of the scientists who rediscovered Mendelism

  23. What is back cross?

  24. Define Genetics.

  25. Define Heredity and variations

  26. Name any two extranuclear lnheritance.

  27. 5 x 3 = 15
  28. What are multiple alleles?

  29. Explain the law of dominance in monohybrid cross.

  30. Differentiate incomplete dominance and codominance.

  31. State the law of segregation.

  32. Write a short note on Atavism.

  33. 2 x 5 = 10
  34. Describe dominant epistasis with an example.

  35. Differentiate continuous variation with discontinuous variation.

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