Question

State main types of mutation.

Answer 1

Cancer is a disease in which division of cells occurs in an unregulated manner. C ancer cells divide continuously to give rise to mass of cells (tumors). In early stages cancer does not show any noticeable effect. But the effect becomes severe with the increasing stage of cancer. The effect of formation of tumor depends upon the organ in which it is located. For example tumor in stomach causes bleeding from mouth. Localized pain and swelling may occur. Some general effects of cancer are sudden loss of weight, fever, excessive tiredness, patches on skin etc.

Answer 2

Answer:

There are three types of DNA Mutations: base substitutions, deletions and insertions.

• Single base substitutions are called point mutations, recall the point mutation Glu Val which causes sickle-cell disease.

• Point mutations are the most common type of mutation and there are two types.