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variations - Coggle Diagram
variations
sources
meiosis
a type of cell division which creates the product of four daughter cells
mutations
purpose
genetic variation
creating alleles
definitions
permanent change in a dna sequence of a gene
examples
more in 'effects'
colour blindness
other changes in dna which dont have a noticeable effect on an organisms health or appearance
sources
errors during dna replication
infections
environmental factors
exposure to mutagens
effects
neutral (none)
eye colour
negative
cancer
sickle cell anaemia
positive
HIV resistance
lactose tolerance