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Define genes, alleles and loci
Explain transcription and eukaryotic splicing
Compare substitution, insertion and deletion
Track homologues and chromatids through two divisions
Use genotype, phenotype and dominance precisely
Use independent assortment in dihybrid crosses
Calculate allele frequencies from genotype counts
Compare selection and genetic drift
Compare methods of obtaining a gene fragment
Explain hybridisation with labelled DNA probes
Explain tandem-repeat variation and DNA profiles
Compare natural and artificial cloning
Calculate producer and consumer production
Explain nitrogen-cycle processes and microbial roles
Explain niches and population limits
Explain primary succession through environmental change
Work through each topic to complete the section.