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Nat5 life on earth

Nat5 Mutations

What are mutations? random change to DNA BASES /genetic information.
How do mutations occur? Mutations occur randomly and at low frequency.
What are the three possible consecquence of mutation? Mutations can be disadvantageous (genetic disease), advantageous or neither.
What is Down syndrome? Down syndrome is a condition caused by an individual having 3 copies of chromosome 21.
Name a medical condition that is caused by genetic mutations Cancer
What is an allele? A version of a gene (e.g. blue eyes or brown eyes)
What is the only process leads to new alleles being created? Mutation
New alleles lead to an increase or decrease in biodiversity increase in biodiversity
Advantageous mutations are more or less common than disadvantageous mutations advantageous mutations are less common
Advantageous mutations can get established in a population by natural selection.
What are adaptations? Features that organisms have, occurring often after a mutation that increase their chance of survival.
What are the types of adaptation? Structural (e.g. snail shell) OR Behavioural (e.g. fox is nocturnal)
What are mutagenic agents? Agents that increase the likelihood of a mutation occurring
Name 4 examples of mutagenic agent? Radiation, mustard gas, UV light & high temperatures.
Created by: dr.prorocic
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