BIS 2B Lecture 11: 11. Mechanics of Change

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: strauss,gerhart

Document Summary

In a non-evolving population, genotype and allele frequency reach equilibrium after one g subsequent generations assuming: No genetic shift (must have infinitely large population ) Mutation causes changes like red allele turning orange. Are mutations bad? one generation and remain constant in. Resulting impacts: no change in allele or gene freq. Codon table: tells what amino acid will be produced. Many codons produce same amino acid so there"s a small chance the change w. Single substitution: one change in nucleotide (sickle cell hemoglobin) Drops one amino acid which messes up the sequence and changes the protein. Genetic testing, found increased risk of breast/ovarian cancer, got double ma. Changes one amino acid which makes a white lizard. Thrives in sand dunes in nm and begins taking over. Can create opportunity for change, source of all variation. Incorrect duplication can be repaired or a new allele can be created. Amino acid differences show long term history between species.