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Natural selection
- Four necessary conditions:
- 1.phenotypic variation among individuals
- 2. variation is (partly) heritable
- 3. more individuals are born than will survive and reproduce (individuals have
- differential fitness)
- 4. fitness is non-random and depends on
- phenotype
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• conspecific nest parasitism
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Partitioning genetic variation
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Narrow-sense heritability
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What you should know about QTL mapping
• why is QTL mapping done? • what are the general steps involved? • why do parental genotypes need to be homozygous? • why score phenotypes and genotypes in F2 offspring? • what is the purpose of genetic markers? • for QTLs that are physically linked to marker loci, what should the associations between phenotype and genotype look like?
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Environmental factors that influence fitness are called:
Agents of selection synonyms:selection factors, selection agents, selection pressures, selection environment, etc. Traits evolve in response to agents of selection to produce adaptations
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