Changing the code through mutuations Flashcards

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1
Q

What is a mutation

A

Spontaneous change in DNA sequence caused by mutagens

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2
Q

What causes mutations

A

Some mutations happen
naturally. Some mutations are the result
of damage caused by chemicals,
radiation or other factors such as smoking or drinking. These are called Mutagens

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3
Q

eg of mutagens

A

ciggarettes, alcohol, durgs

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4
Q

what are the two types of mutations

A

Point mutation
CHromsome mutation

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5
Q

when does Point mutation occur

A

Point mutations occur when a
nucleotide is altered, added, or
deleted. This can lead to changes in
the amino acid sequence in a protein.

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6
Q

what are the two types of poimt mutation

A

substitution - Substitution affects only one
nucleotide, eg a T is replaced by an A.
Frameshift- are insertions or deletions of nucleotides in DNA that change the reading
frame

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