Table of Contents
What are 3 causes of DNA mutations?
Mutations can occur during DNA replication if errors are made and not corrected in time. Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation.
What is the most common DNA mutation?
In fact, the G-T mutation is the single most common mutation in human DNA. It occurs about once in every 10,000 to 100,000 base pairs — which doesn’t sound like a lot, until you consider that the human genome contains 3 billion base pairs.
What diseases are caused by DNA mutations?
Types of Changes in DNA
| Class of Mutation | Type of Mutation | Human Disease(s) Linked to This Mutation |
|---|---|---|
| Point mutation | Deletion | Cystic fibrosis |
| Chromosomal mutation | Inversion | Opitz-Kaveggia syndrome |
| Deletion | Cri du chat syndrome | |
| Duplication | Some cancers |
What are two things that cause DNA mutation?
External Factors That Produce Mutations in DNA Chemical Factors. Certain man-made chemicals have been known to cause mutations, in most cases by revising the basic chemical composition of a cell’s DNA. Radiative Factors. Our world contains different kinds of radiation, both occurring naturally and resulting from human activity, that also encourage mutations. Biological Factors. Identifying Factors.
What happens to DNA as a result of mutation?
Mutation is a permanent alteration in the nucleotide sequence of DNA ( deoxyribonucleic acid ). As a result of mutation, the amino acid sequence of proteins encoded by the stretch of DNA or gene is changed, which in turn, may alter the composition and/or function of body cells and tissues.
What are some consequences of mutations in the DNA?
Some mutations don’t have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.
What can cause mutation when the cell copies its DNA?
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke . Mutations can occur during DNA replication if errors are made and not corrected in time.