Question

What are the three types of genetic variations?

Answer 1

Genetic variations:

Genetic variations are the differences among the gene sequences which occurs due to mutation.

The different types of genetic variations are as follows:

• Single base-pair substitution :

1. This is also known as single nucleotide polymorphisms.
2. In this type of substitution a single nucleotide is substituted in place of some other nucleotide.
3. This is quite common during DNA replication.

• Insertion or deletion:

1. During replication of DNA a single nucleotide can get inserted or even get deleted from the sequence.
2. This can lead to genetic diversity by causing variation in the subsequent DNA replications.

• Structural variation:

1. It is the genetic variation that occurrs over a larger DNA sequence.
2. The DNA sequence of two individuals are never the same.
3. Structural variation is mainly responsible for genetic diversity.