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Mutation and Variation

Types and effects of chromosomal and gene mutations including chromosomal number variations, structural changes, and their impact on genetic variation

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

What does chromosomal mutation mean?

  1. Change in the number of chromosomes
  2. Change in the structure of chromosomes
  3. Change in arrangement of genes in a chromosome
  4. All of the above
  5. Replication of chromosomes
Question 2 Multiple Choice (Single Answer)

What is the addition or loss of one or more than one set of chromosomes in a diploid organism called?

  1. Euploidy
  2. Aneuploidy
  3. Ploidy
  4. All of the above
  5. Hypoploidy
Question 3 Multiple Choice (Single Answer)

What are the individuals having three sets of chromosomes called?

  1. Trisomic
  2. Triploidic
  3. Trimer
  4. Trinomial
  5. Tetraploidic
Question 4 Multiple Choice (Single Answer)

What is the loss of a pair of chromosomes from a diploid set called?

  1. Monosomy
  2. Nullisomy
  3. Disomy
  4. Double monosomy
  5. Hyperploidy
Question 5 Multiple Choice (Single Answer)

What causes hereditary variations?

  1. Environmental changes
  2. Mutations
  3. Gene transfer
  4. Jumping gene
  5. Crossing over
Question 6 Multiple Choice (Single Answer)

If the original chromosome ABCDEFGH is changed to ADCBEFGH, ____________ has taken place.

  1. inversion
  2. translocation
  3. deletion
  4. duplication
  5. recombination
Question 7 Multiple Choice (Single Answer)

What is the effect of addition or deletion of one or few base pairs?

  1. Translocation
  2. Inversion
  3. Frame shift
  4. Hyperploidy
  5. Hypoploidy
Question 8 Multiple Choice (Single Answer)

What are the mutations occurring in sex chromosomes collectively called?

  1. Autosomal mutation
  2. Germ mutation
  3. Lethal mutation
  4. Chromosomal mutation
  5. Point mutation
Question 9 Multiple Choice (Single Answer)

Who coined the term 'mutation'?

  1. Gregor Mendel
  2. Langdon Down
  3. Hugo de Vries
  4. T. H. Morgan
  5. Bateson and Punnet
Question 10 Multiple Choice (Single Answer)

What is the effect of sudden changes in the environmental conditions?

  1. Induced mutation
  2. Spontaneous mutation
  3. Gene breakage
  4. Gene transfer
  5. Adaptation
Question 11 Multiple Choice (Single Answer)

What is the result of the trisomy of 21st chromosome?

  1. Turner's syndrome
  2. Down's syndrome
  3. Klinefelter's syndrome
  4. Edward's syndrome
  5. Cri-du-chat syndrome
Question 12 Multiple Choice (Single Answer)

Which of the following processes change(s) the structure of chromosomes?

  1. Deletion
  2. Duplication
  3. Inversion
  4. Translocation
  5. All of the above
Question 13 Multiple Choice (Single Answer)

What causes increase in the chromosome size?

  1. Deletion
  2. Duplication
  3. Inversion
  4. Translocation
  5. Recombination
Question 14 Multiple Choice (Single Answer)

The molecular change in chromosomes is called

  1. chromosomal aberration
  2. point mutation
  3. spontaneous mutation
  4. induced mutation
  5. transformation
Question 15 Multiple Choice (Single Answer)

What causes heriditary variations?

  1. Environmental changes
  2. Mutations
  3. Gene transfer
  4. Jumping gene
  5. Crossing over
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