what is meant by chromosomal mutations and their types?
Answers
Heya...
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ANSWER FOR YOUR QUESTION IS HERE:
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Chromosomal Mutations: In living organisms, mutations occur at a rate one per every ten million cell replications. And as compared to the more than 100 trillion cells in the human body, this number is rather insignificant.
Types of chromosomal mutations: 1. Deletion
2. Insertion
3. Inversion
4. Translocation
1. Deletion
This type of mutation occurs when a part of the DNA is not duplicated or is lost during DNA replication. The size of this region can either be a mere nucleotide or can be large as an entire chromosome.
2. Duplication
This type of mutation occurs when an extra copy of a region (or regions) in the DNA is produced. This duplicated region can either be located in its normal location in the chromosome or sometimes be located in other parts of the chromosomes or even in another chromosome.
3. Inversion
During inversion, a portion in the chromosome is reversed and gets inserted back into the chromosome. Basically, two types of inversion exist: pericentric and paracentric.
4. Translocation
Translocation happens when a fragmented chromosome tends to join with a nonhomologous chromosome. This newly-formed segment then detaches from the chromosome and moves to a new position on another chromosome.
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