Objectives of Chromosomal Aberration

Multiple Choice Questions (MCQs)

1-The random abnormal number of chromosomes in the

animals is called:                    •

(a) Poh, ploidy (b) Euploid     (c) aneuploid) (d) None

  1. A neuploith is mostly caused by:

(a) nondisjunction(b) Crossing on er       (c) renersion

  1. X0 is:

(a) Trisomic       (h) Monosomic (c) Tertrasomics       Nullisomics

  1. Mosaic trisomy is:

(a) Trisomic       (h) Monosomic (c)Tertrasom s (U) Nullisomics

  1. A condition in which the organisms have more than two complete sets of chromosomes is called:

(a) Polyploidy (b) Euploidy        (c) aneuploidy (d) None

  1. Triticale IF a:

(a) Polyploidy’ (h) Euploidy        (c ) aneuplcady (d) None

  1. Which of the followings is hexaploid?

(a) Wheat          (h) maize           ( c ) cotton       (d) Oat

. 8.       Which of the followings is octaploid?

(a) Wheat          (h) strawberry (c) cotton          • (1) Oat

  1. The interchange of parts between non-homologous
    chromosomes is called:

‘(it) Duplication (b) translocation(c) Inversion      (d) Deletion

10-Frameshift mutation is caused due to?

(a) Duplication (6) translocation(c) Inversion       (d) Deletion

11-Cri du chat is caused due to:

(a) Duplication (b) translocation(c) Inversion      (d) Deletion

Answers:

1. (c)  2. (b) 3. (b) 4. (a)    5. (a)  6. (a)  7. (d) 8. (b)


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9. (b)  10. (d) 11.
Fill in blanks

1. Any numerical or structural change in the usual chromosome complement of a cell or organism is called chromosome_________.

  1. The random abnormal number of chromosomes in the animals  is

called as______

  1. Ancuploidy is mostly caused by______
  2. ________ are polyploids in with chromosomes derived from a
    single species.
  3. __________ is an example of an allopolyploid. It has six
    chromosome sets.
  4. Polyploidy can he induced in cell culture by some chemicals like
  5. The interchange of parts between non-homologous chromosomes is called chromosome____
    Ans:

    1. aberration 2. aneuploidy 3. nondisjunction 4.Autopolyploid

    5. Triticale     6. colchicine   7. translocation

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