Mutations (Leaving Cert Biology): Flashcards
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Practise the cards
13 cards from this deck
Definition of mutation
Definition of mutation
A change in the amount or structure of DNA
How natural mutations occur
How natural mutations occur
DNA doesn't copy correctly during cell division
Definition of somatic cell
Definition of somatic cell
A body cell not involved in reproduction
Result of mutations in somatic cells
Result of mutations in somatic cells
Can lead to cancer
Why gamete mutations are more serious
Why gamete mutations are more serious
They pass to offspring, affecting all their cells
Definition of mutagen
Definition of mutagen
Agent that increases the rate of mutations
Many mutagens are also...
Many mutagens are also...
Carcinogens (cancer-causing agents)
Radiation mutagen examples
Radiation mutagen examples
UV rays, X-rays, gamma rays
Chemical mutagen examples
Chemical mutagen examples
Cigarette smoke, caffeine, formaldehyde
Definition of gene mutation
Definition of gene mutation
A change in a single gene
Example of gene mutation disease
Example of gene mutation disease
Sickle cell anaemia
Example of chromosome mutation
Example of chromosome mutation
Down's Syndrome
Chromosome count in Down's Syndrome
Chromosome count in Down's Syndrome
47 instead of 46