Variation
and
evolutio
Biology chapter 14
,A bit on
• Not all parts of DNA code for proteins.
• Non-coding parts of DNA can switch gene
genes
and off
• variations in these areas of DNA may affe
how genes are expressed.
, 14.1
• Nature: Genetic variations caused by a
mutation
Variation
• Nurture: Environmental variation
• We can use identical twins to research
evidence of nature and nurture by putting
them in different environments
• However these studies have ethical conce
• It is easier to do it on plants
and
evolutio
Biology chapter 14
,A bit on
• Not all parts of DNA code for proteins.
• Non-coding parts of DNA can switch gene
genes
and off
• variations in these areas of DNA may affe
how genes are expressed.
, 14.1
• Nature: Genetic variations caused by a
mutation
Variation
• Nurture: Environmental variation
• We can use identical twins to research
evidence of nature and nurture by putting
them in different environments
• However these studies have ethical conce
• It is easier to do it on plants