Variation (Edexcel GCSE Biology): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
ShowHide
Practise the cards
13 cards from this deck
What is phenotype?
What is phenotype?
Organism's appearance/characteristics
What is genotype?
What is genotype?
The genes an organism inherited
How does sexual reproduction cause genetic variation?
How does sexual reproduction cause genetic variation?
Combines genes from mother & father
Where are genes passed from parent?
Where are genes passed from parent?
Sex cells
Which individuals have same genotype?
Which individuals have same genotype?
Identical twins
How do mutations cause variation?
How do mutations cause variation?
Introduce genetic variation in DNA sequence
Effect of most mutations
Effect of most mutations
No effect on phenotype
What happens to advantageous mutations?
What happens to advantageous mutations?
Become common phenotype via natural selection
Two factors determining phenotype
Two factors determining phenotype
Genotype & environment
Environmental variation examples
Environmental variation examples
Scars (animals), yellow leaves (plants)
What causes cystic fibrosis?
What causes cystic fibrosis?
Mutation in salt/water control protein
Effect of cystic fibrosis
Effect of cystic fibrosis
Thick sticky mucus in lungs/digestive system
Example of trait from genes + environment
Example of trait from genes + environment
Weight