ch 20-21 answers Darwin Cool Links
Ch 20
1.Characteristics which are acquired during the life of an individual are passed on to offspring.
2Characteristics acquired during an organism's life are not passed on through genes.
3.A cage with no predators, in which food is provided in low dishes.
4. in evolution than variations acquired during individual lifetimes.
5. DNA analysis and protein comparison
6. Characteristics are inherited as genes on chromosomes.
7.? The earth is 6,000 years old and populations are unchanging
8.a change in the genetic makeup of a population
9.the arm of a human
10. analogous
11. This technique is called (DNA hybridization
12. the age of Earth and gradual geological processes
13. homologous structures.
14. the need for individuals to adapt to their environment.
15. Populations tend to increase at a rate greater than their food supply.
16. morphology and anatomy
17. mycology
18. the source of genetic variation
19.New variations continually arise by mutation.
20. The light moths were cryptically colored (blended in with the environment).
21. Lamarckism.
22. in the evolutionary process.
23. On the Origin of Species by Means of Natural Selection
24. general categories
25. adaptation.
26. Plato.
27. uniformitarianism.
28. the fossil record
29. gradualist
30. Mendel's laws of inheritance
31. Wallace
32. The potential for population growth exceeds what the environment can support
33. the modern synthesis
34. mechanism of evolutionary change.
35. the environment tends to create favorable characteristics within populations.
36. environment.
37.production of offspring is matched to the abundance of essential resources
Ch 21
1. an increasing mutation rate
2./3
4.genes in a population at any time.
5.genetic drift
6. gene flow.
7. differential reproductive success
8. a male lion's mane
9. o.48
10. bottleneck effect
11. Diploid organisms express less of their genetic variability than haploid organisms.
12. .48
13.You cannot estimate allele frequency from this information.
14.cline. .
15. population
16. mutation
17. reduces fitness.
18. genetic recombination
19. individuals that are heterozygous for the allele.
20. the number of its offspring that survive to reproduce
21. It occurs in populations with a selection coefficient equal to 1.0.
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22. .4
23. .6
24. 1920
25. ---
26. 4
27 5
28. 3
29 2
30 3
31 4
32 2
33. more viable offspring
34. .80
35. stable indefinitely
36. gene flow
37. mistakes in translation of structural genes
38. the number of fertile offspring
39. The two phenotypes are about equally adaptive under laboratory conditions
40. 0.70
41. 0.42
42. genetic drift.
43. the source of genetic variation.
44---
45. The homozygous recessive genotype of this allele has a relative fitness of 0 and a selection coefficient of 1.
46. It is the differential survival and reproduction of the most fit phenotypes.
47. 400
48.genetic drift.
49. the founder effect