Introduction (AQA A-Level Biology): Flashcards
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Levels of biodiversity
Levels of biodiversity
Within species, between species, tissues/organs/cells within organisms
What is a gene?
What is a gene?
Specific region on a DNA molecule
What is a locus?
What is a locus?
Position where a gene is located on DNA
What does universal genetic code evidence?
What does universal genetic code evidence?
All organisms evolved from common ancestors
How does sexual reproduction create variation?
How does sexual reproduction create variation?
Combines genes from two parents
What is a mutation?
What is a mutation?
Spontaneous random change to DNA structure
What is natural selection?
What is natural selection?
Better-adapted individuals pass more alleles to next generation
DNA stability enables
DNA stability enables
Faithful reproduction of parental characteristics in offspring
Measure within-species diversity by comparing
Measure within-species diversity by comparing
DNA base sequences or protein amino acid sequences
Diversity indices incorporate
Diversity indices incorporate
Species richness and evenness of distribution