Botany - Classical Genetics Model Question Paper

12th Standard EM

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Biology

Time : 01:00:00 Hrs
Total Marks : 50
    10 x 1 = 10
  1. Extra nuclear inheritance is a consequence of presence of genes in

    (a)

    Mitrochondria and chloroplasts

    (b)

    Endoplasmic reticulum and mitrochondria

    (c)

    Ribosomes and chloroplast

    (d)

    Lysososmes 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

    (a)

    aaBB

    (b)

    AaBB

    (c)

    AABB

    (d)

    aabb

  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. 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

  5. Among the following characters which one was not considered by Mendel in his experimentation pea?

    (a)

    Stem – Tall or dwarf

    (b)

    Trichomal glandular or non-glandular

    (c)

    Seed – Green or yellow

    (d)

    Pod – Inflated or constricted

  6. An allede is__________

    (a)

    another word for a gene

    (b)

    Alternate forms of a gene

    (c)

    morphological expression of a gene

    (d)

    genetic make up of an organism

  7. Crossing of F I to anyone of the parent refers to _____________

    (a)

    selfing

    (b)

    back cross

    (c)

    test cross

    (d)

    all of the above

  8. Identify the mismatched pair

    (a)

    Chloroplast inheritance - Gregor Mendel

    (b)

    Polygenic inheritance - H. Nilsson

    (c)

    Lethal genes - E. Baur

    (d)

    Incomplete dominance - Carl Correns

  9. 'Gametes are never hybrid' is concluded by ___________

    (a)

    Law of dominance

    (b)

    Law of segregation

    (c)

    Law of independent environment

    (d)

    Law of lethality

  10. The 1 : 2 : 1 ratio of co-dominance process Mendel's ___________

    (a)

    Law of dominance

    (b)

    Law of recessiveness

    (c)

    Law of segregation

    (d)

    Law of independent assortment

  11. 5 x 1 = 5
  12. Cotyledon color

  13. (1)

    Seed capsule in xxxxx

  14. Pod shape

  15. (2)

    Leaf color in rice plant

  16. Duplicate genes

  17. (3)

    15:1

  18. Inhibitory genes

  19. (4)

    Green / Yellow

  20. Duplicate genes

  21. (5)

    Inflated / Constricted

    5 x 2 = 10
  22. Name the seven contrasting traits of Mendel.

  23. Give the names of the scientists who rediscovered Mendelism

  24. Who coined the term genetics? Also, define it.

  25. Define Heredity and variations

  26. Which organism was studied by Gregor Mendel? How many traits does he considered on his experiments

  27. 5 x 3 = 15
  28. Differentiate incomplete dominance and codominance.

  29. What is meant by cytoplasmic inheritance

  30. Point out any three importance of variations.

  31. Why Mendel selected pea plants for his experiments.

  32. Mala is a genetic research student. She was given a plant to identify whether it is a homozygous or heterozygous for a particular trait. How will she proceed further?

  33. 2 x 5 = 10
  34. Explain with an example how single genes affect multiple traits and alleles the phenotype of an organism.

  35. Bring out the inheritance of chloroplast gene with an example.

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