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What happens when DNA structure is changed?

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Insertions and deletions are two other types of mutations that can affect cells at the gene level. An insertion mutation occurs when an extra nucleotide is added to the DNA strand during replication. This can happen when the replicating strand "slips," or wrinkles, which allows the extra nucleotide to be incorporated (Figure 2). read more

changing DNA structure makes it unstable and it is short lived. there are many DNA structures - most common is B-DNA , rest are - Z,A,C,D - DNA. they are relatively more unstable, short lived , and they are different in terms of their helix turn ( right or left ) , pitch of helix, diameter etc. read more

DNA “typos” cause variation Any time DNA is copied, a mistake or change can occur in the letters of the DNA sequence, or gene. These changes result in variations or differences in DNA from person to person. read more

Structural changes can occur during the formation of egg or sperm cells, in early fetal development, or in any cell after birth. Pieces of DNA can be rearranged within one chromosome or transferred between two or more chromosomes. The effects of structural changes depend on their size and location, and whether any genetic material is gained or lost. read more

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Wikipedia:
DNA

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Genetic Changes ppt video online download
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