Evolution And History

Heredity 37 guanine from cytosine—and then each base on each now- single strand attracts its complementary base, reconstitut- in ...

38 CHAPTER 2 | Genetics and Evolution The process of meiotic division has important impli- cations for genetics. Because paired ...

Heredity 39 or phenotype, as the homozygous (AA), even though the two have a somewhat different genetic composition, or genotype ...

40 CHAPTER 2 | Genetics and Evolution Characteristics subject to polygenetic inheritance ex- hibit a continuous range of variati ...

Evolution, Individuals, and Populations 41 For the sake of argument, let’s say 35 percent. In other words, your DNA is over one- ...

42 CHAPTER 2 | Genetics and Evolution protein making a new biological task possible. Without the variation brought in through ra ...

Evolutionary Forces 43 In such cases, it is unlikely that the gene frequencies of the smaller population will be representative ...

44 CHAPTER 2 | Genetics and Evolution distances—affect gene flow. For example, the last 500 years have seen the introduction of ...

Evolutionary Forces 45 forces of nature. In the process, the frequency of genetic variants for harmful or nonadaptive traits wit ...

46 CHAPTER 2 | Genetics and Evolution lethal, this allele’s frequency would still decrease only gradually. Even with complete se ...

The Case of Sickle-Cell Anemia 47 insect wings. These did not arise so that insects might fly, but rather as structures that wer ...

48 CHAPTER 2 | Genetics and Evolution increased ability to survive the effects of the malarial para- site; it seems that the eff ...

The Case of Sickle-Cell Anemia 49 This example also points out that adaptation tends to be specific; the abnormal hemoglobin was ...

50 CHAPTER 2 | Genetics and Evolution In addition to these sorts of very long-term effects that climate may have imposed on huma ...

Suggested Readings 51 Questions for Reflection Have scientific understandings of the human genetic code and technologies such a ...

Over a decade of civil war in the Democratic Re- public of Congo, the natural habitat of bonobos, and genocide in neighboring Rw ...

53 Living Primates CHAPTER 3 Chapter Preview What Are the Characteristics of the Primates Inhabiting the World Today? Compared t ...

54 CHAPTER 3 | Living Primates The diversity of life on earth attests to the fact that living organisms solve the challenge of s ...

Methods and Ethics in Primatology 55 teaching them to communicate through pictures on a com- puter screen or with American Sign ...

56 CHAPTER 3 | Living Primates of the protected preserve. These gorillas spend close to 90 percent of their time outside the nat ...