Variation (AQA GCSE Biology): Flashcards
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Practise the cards
11 cards from this deck
2 factors that determine phenotype
2 factors that determine phenotype
Genotype and environment
Definition of genotype
Definition of genotype
The genes an organism inherited
How genes pass from parents to offspring
How genes pass from parents to offspring
In sex cells
What creates genetic variation
What creates genetic variation
Combining genes from mother and father
Which organisms have identical genotypes?
Which organisms have identical genotypes?
Only identical twins
Environment's role in phenotype
Environment's role in phenotype
Conditions where organism lives/grows affects appearance
Environmental effects on appearance (examples)
Environmental effects on appearance (examples)
Scars in animals; smaller/yellow leaves in plants
Example of characteristic affected by both genetics AND environment
Example of characteristic affected by both genetics AND environment
Weight
How genetic variation is introduced
How genetic variation is introduced
By mutations in DNA sequence
Effect of most mutations on phenotype
Effect of most mutations on phenotype
Most have no effect
What happens if a mutation is advantageous?
What happens if a mutation is advantageous?
Natural selection makes it become common in the population relatively quickly