Variation (Edexcel GCSE Biology Combined Science): Flashcards
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Practise the cards
10 cards from this deck
What is phenotype?
What is phenotype?
Observable characteristics of an organism
What two factors determine phenotype?
What two factors determine phenotype?
Genotype and environment
What is genotype?
What is genotype?
The genes an organism inherited
How are genes passed from parents?
How are genes passed from parents?
In sex cells
What creates genetic variation from parents?
What creates genetic variation from parents?
Combining genes from mother and father
Which organisms have the same genotype?
Which organisms have the same genotype?
Identical twins only
What introduces genetic variation?
What introduces genetic variation?
Mutations in DNA sequence
What is the effect of most mutations on phenotype?
What is the effect of most mutations on phenotype?
No effect
What happens to advantageous mutations?
What happens to advantageous mutations?
Become common quickly via natural selection
How does sexual reproduction cause variation?
How does sexual reproduction cause variation?
Random combination of alleles