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HomeHomework HelpbiologyDNA Mutations and Genetic Code

DNA Mutations and Genetic Code

The process by which changes occur in the DNA sequence of an organism, including point mutations, insertions, and deletions, and how these changes affect the genetic code, protein synthesis, and ultimately, the phenotype of an organism

intermediate
3 hours
Biology
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Overview

DNA mutations are essential changes in the genetic code that can influence an organism's traits and health. They can occur naturally or be induced by environmental factors. Understanding mutations helps us grasp how genetic diversity arises and how it can lead to evolution. Some mutations can cause ...

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Key Terms

Mutation
A change in the DNA sequence.

Example: A mutation in the BRCA1 gene can increase breast cancer risk.

Point Mutation
A mutation affecting a single nucleotide.

Example: Sickle cell disease is caused by a point mutation in the hemoglobin gene.

Insertion
A mutation where extra nucleotides are added to the DNA sequence.

Example: An insertion can disrupt the reading frame of a gene.

Deletion
A mutation where nucleotides are removed from the DNA sequence.

Example: Cystic fibrosis can result from a deletion in the CFTR gene.

Duplication
A mutation where a segment of DNA is copied.

Example: Some cancers are associated with gene duplications.

Genetic Code
The set of rules by which information encoded in DNA is translated into proteins.

Example: The genetic code consists of codons, each representing an amino acid.

Related Topics

Genetic Engineering
The manipulation of an organism's DNA to alter its characteristics.
advanced
Evolutionary Biology
The study of the processes that drive the evolution of species.
intermediate
Molecular Biology
The branch of biology that deals with the molecular basis of biological activity.
advanced

Key Concepts

Types of mutationsCauses of mutationsEffects on proteinsGenetic inheritance