science
Grade-10
Easy

Question

Generally, the mutations are:

  1. Harmful.

  2. Dominant.

  3. Recessive.

  4. Useful.

hintHint:

Mutations can cause genetic disorder or cancer.

The correct answer is:

Harmful.


    • Mutation refers to change in the sequence of nucleotides in the DNA of an individual
    • Mutation can be result of errors that occur during cell division or due to environmental factors
    • The external factors that cause mutations are called mutagens
    • Mutations can be classified into:
    1. Harmful mutations: Which leads to cancer or genetic disorder 
    2. Beneficial mutations: Which provides traits to increase chance of survival of an individual
    3. Silent mutations: Which does not have any effect on the individual
    • Mutations help in the evolution of an organism, still the adverse effect posed by mutation tends to be harmful to the population

    • In harmful mutation, due to insertion or deletion of a base the resulting protein synthesis become faulty
    • In silent mutation, the alteration in base sequence is such that the final protein is not changed

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