Содержание
- 2. Genetic load Genetic load: the extent to which the fitness of an individual is below the
- 3. Genetic load: the difference between the average fitness of the population and the fitness of the
- 4. Types of Genetic Load Three main kinds of genetic load may be recognized: A.Input Load: in
- 5. C. Substitutional Load: Which is generated by selection favouring the replacement of an existing allele by
- 7. Genetic load an Example… Selective death (or genetic death): the chance that an individual will die
- 8. Causes of Genetic Load 1.Deleterious mutation 2.Beneficial mutation 3.Inbreeding 4.Recombination/segregation load
- 9. DELETERIOUS MUTATIONS Deleterious mutation load is the main contributing factor to genetic load overall. Most mutations
- 10. Beneficial mutation New beneficial mutations create fitter genotypes than those previously present in the population. When
- 12. Inbreeding Inbreeding increases homozygosity. In the short run, an increase in inbreeding increases the probability with
- 13. Recombination/segregation load Combinations of alleles that have evolved to work well together may not work when
- 14. Recombination load arises through unfavorable combinations across multiple loci that appear when favorable linkage disequilibria are
- 15. Genetic load : Mutation
- 16. Genetic load: segregational Segregational load is a big problem for the balance school: Well known examples
- 17. There is a cost to selection, in genetic death, during this time period
- 18. Migration load Migration load is the result of nonnative organisms that aren’t adapted to a particular
- 19. “It is altogether unlikely that two genes would have identical selective values under all the conditions
- 20. Defining Directional Section Directional selection: selection that favours the phenotype at an extreme of the range
- 21. Defining two types directional selection Type 1: Positive Darwinian selection: directional selection for fixation of a
- 22. Type 2: Negative Darwinian selection: directional selection for removal of a new and deleterious mutation from
- 25. Скачать презентацию