BIOL 1000 Midterm: BIOL 1001 MIDTERM II NOTES.docx
Document Summary
Importance of variation in populations for evolution: more genes that code for possibly advantageous phenotypes, thus making the population stronger. Why 2 individuals of the same species can have different genotypes but the same phenotype and vice versa: phenotype also influenced by environmental factors, interaction between genes and environment (environment can influence gene expression), some variations in. Dna don"t change the amino acid sequence so no change in phenotype. Interpret from a graph of a quantitative character, the degree of variation for that character within the population: broad, low curve a lot of variation; high, narrow curve little variation (width of curve is proportional to variability) Mutations = heritable change in dna: random not acquired because they are seen as advantageous (eg. deleterious mutations alter an individual in harmful ways, lethal mutations cause death, neutral. Hox family genes body plan, specify where appendages attach. Pax 6 formation of light sensing organs (eyes)
