Variation (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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What two factors determine an organism's phenotype?
What two factors determine an organism's phenotype?
Genotype and environment
Definition of genotype
Definition of genotype
The genes an organism inherited
How genes are passed from parent to offspring
How genes are passed from parent to offspring
In sex cells
What creates genetic variation in offspring
What creates genetic variation in offspring
Combining genes from mother and father
Which organisms have the same genotype
Which organisms have the same genotype
Identical twins
Definition of environment in variation
Definition of environment in variation
The place an organism lives in
Examples of environmental effects on phenotype
Examples of environmental effects on phenotype
Scars in animals; smaller/yellow leaves in plants
Characteristic from both genetics AND environment
Characteristic from both genetics AND environment
Weight
What introduces genetic variation
What introduces genetic variation
Mutations in DNA sequence
Effect of most mutations on phenotype
Effect of most mutations on phenotype
No effect
Outcome when advantageous mutation occurs
Outcome when advantageous mutation occurs
Natural selection makes it common phenotype quickly