Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 19, Problem 25QP
Genomics and Human Evolution
The Denisovan genome contains sequences that originated from an unknown human species. Using Figure 19.11, speculate on which species this might be. Is it possible that there are other ancestral species that may remain to be discovered that would change the phylogeny presented in the figure?
FIGURE 19.11 Estimates for the dates of origin and extinction for the three main groups of hominins (green, blue, and orange). The australopithecines split into two groups about 2.7 million years ago. One of those groups, the genus Homo, contains the ancestors to our species, H. sapiens.
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The hominid evolutionary tree (Figure 20.19)
Sahelanthropus tchadensis
Orrorin tugenensis
Ardipithecus ramidus
Ardipithecus
kadabba
Au. anamensis
Au. garhi
Au. afarensis
Au. africanus
P. boisel
- Homo
Paranthropus
= Australopithecus
= early hominids
= age of fossils
- inferred relationships between
hominid species
-- relationships of major groups
R aethiopicus
P robustus
H. ergaster
H. habilis
H. floresiensis
Hrectus
to
H. neanderthalensis
of hominids
H. heidelbergensis
H sapiens
miocene
pliocene
pleistocene
halocene
7.
5.
1.
millions of years ago
Figure 20.19 Evolutionary reconstruction of hominids; the human family tree. Age ranges of
fossils are shown by red lines, and tan lines represent inferred relationships based on fossil
evidence. Major groups are contained within colored boxes. Au. = Australopithecus; P. =
Paranthropus; H. = Homo.
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suggests that the genus Homo evolved a little over 2 million years ago.
is reconstructed based on morphology and estimated age of…
Once nuclear DNA sequencing became fast and able to handle sequencing ancient DNA, living humans were found to have some Neanderthal genes. Is this finding clear evidence that some early modern humans did indeed hybridize with Neanderthals? Why?
20. The ~100 Neanderthal remains from the site Krapina, Czech Republic,
exhibit an abrupt change to a more modern appearance approximately 40,000 ybp, indicating that Neanderthals were completely replaced by Anatomically modern humans.
exhibit a slow transition from Neanderthals to more modern appearance over time.
were all slaughtered by an incoming hoard of Anatomically Modern Homo sapiens.
demonstrate that Neanderthal mitochondrial DNA is not found among any living human populations.
provide evidence for care of the elderly.
Chapter 19 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 19.8 - Why dont genetic markers on the Y chromosome...Ch. 19.8 - Prob. 2GRCh. 19 - If you suspected that heterozygous carriers of a...Ch. 19 - If allele frequencies in the hemoglobin gene are...Ch. 19 - Prob. 1QPCh. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - Prob. 4QPCh. 19 - Prob. 5QPCh. 19 - How Can We Measure Allele Frequencies in...
Ch. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - Using the HardyWeinberg Law in Human Genetics...Ch. 19 - Prob. 10QPCh. 19 - Using the HardyWeinberg Law in Human Genetics In a...Ch. 19 - Prob. 12QPCh. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Prob. 15QPCh. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Prob. 17QPCh. 19 - Prob. 18QPCh. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Natural Selection Affects the Frequency of Genetic...Ch. 19 - Prob. 21QPCh. 19 - Prob. 22QPCh. 19 - The Evolutionary History and Spread of Our Species...Ch. 19 - Prob. 24QPCh. 19 - Genomics and Human Evolution The Denisovan genome...
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