BRAINCAKEInvestigating Diversity
The theory of evolution is a model used by some scientists.
Comparing genetic diversity between species helps scientists determine theoretical evolutionary relationships. It also helps in the classification of organisms.
In order to determine the relationships between organisms the scientists can:
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Key terms in this lesson
- gene
- A length of DNA that codes for a polypeptide or a functional RNA molecule, at a specific locus on a chromosome.
- allele
- One of the different versions of a gene, arising by mutation, that occupy the same locus on homologous chromosomes.
- species
- A group of organisms with similar characteristics that can interbreed to produce fertile offspring.
- classification
- The organisation of living organisms into groups based on their similarities and differences.
- genetic diversity
- The variety of alleles present within the gene pool of a population or species.
More in Biodiversity
- Species Diversity and Ecosystems
- The Impact of Agriculture
- Balancing Conservation and Farming
- Managing Ecosystems
- Comparing DNA
- Comparing mRNA
- Comparing Amino-acids Sequences
- Sampling
All 33 lessons in Biodiversity · All AQA AS-level Biology topics