24. in the early stages, how do all vertebrate embryos compare with each other? what does this
indicate?
33. what is stint selection dww the graph
25. organisms with homologous (similar)
probably more closely related
34. what is disruptive selection? drww the graph
chapter 17 evolution of populations
section 17.1
26. what is meant by the gene pool?
35. a random change in allele frequency is called
36. suppose a widespread disease is large portions of a population. individuals that survive the
disease have rare alleles but there is only a few survivors. once the new population grows, what type of
effect on population has occurred?
27. name the 3 ways variations in genotypes arise.
37. give an example of the founder effect that is different than your book. (think of an example and it
doesn't have to be real life)
28. how many alleles exist for each tralt in a gene pool?
29. how is allele frequency relative frequency) determined?
38. do populations change quickly or slowly?
30. what are the three sources of genetic variation? briefly explain each
39. do individuals evolve?
40. do populations evolve?
41. what does the hardy-weinberg theory state about allele frequencies in a population?
31. what is a single-gene trait and what is a polygenic tralt?
42. list the conditions that must hold true in the ideal population for hardy-weinberg to be correct
section 172
43. would the hardy-weinberg law apply to real populations?
32. what is directional selection? draw the graph.
44. does the hardy-weinberg taw apply to small and medium sized populations?