Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Chapter 21, Problem 37P
As noted in Fig. 21.22, humans now living in Oceania (e.g, Melanesia, Micronesia, Polynesia, and Australia) represent an early offshoot in the spread of humans around the world from an origin in Africa.
| a. | Given these |
| b. | Explain why variants found in Denisovan DNA are found only in modern humans living in Southeast Asia and Oceania but nowhere else on earth. |
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a.) If all the blue dots represent FST values between one species in the Americas and one species in Oceania, does this pattern of genetic similarity on the graph suggest that Native Americans and the people of Oceania followed very different migration routes? Why or why not?
b.) Given the maximum possible FST value (based on how this statistic is calculated), is it feasible that all human populations have most of the genetic variation within a given population with very little genetic differentiation between any two populations? Give a reason for your answer.
c.) Does the graph above suggest that interbreeding during these human contacts had a considerable effect on the gene pools of the two communities? Or is it more likely that only very limited or no interbreeding took place between islanders of Oceania and Native Americans from S. America? Give a reason for your answer.
Native American populations in North and South America have mitochondrial DNA haplotypes that can be traced to populations
in northeast Asia. The Aleut and Eskimo populations in the far northern parts of North America possess a subset of the same
haplotypes that link other Native Americans to Asia, and also have several additional haplotypes that can be traced to Asian
origins but are not found in native populations in other parts of the Americas.
Which statement offers a possible explanation for this observation?
The pattern of haplotypes in the Aleut and Eskimo populations suggests that their ancestors' migration into the
American Arctic regions was separate from the migrations that eventually populated the rest of North and
South America.
The subset of similar haplotypes between the two populations suggests that the Native American populations with a link
to Asia descended from the Aleut and Eskimo populations residing in the far northern parts of North America.
Sharing a subset of…
Please help with the following:
Lactase persistence is an adaptation to milk drinking that has developed since the beginning of agriculture ~10 KYA. What is the relationship between the alleles driving this ability in European, Indian and African populations?
A. One allele is responsible for lactase persistence in Europeans and Indians because of where agriculture originated and was introduced through migration. routes.
B. The allele responsible for lactase persistence in all three populations is the same allele on the LCT gene.
C. Different alleles are responsible for lactase persistence in each population.
D. One allele is responsible for lactase persistence in Europeans, but other alleles cause the trait in Indian and African populations.
E. One allele is responsible for lactase persistence in Africans, but other alleles cause the trait in European and Indian populations.
Chapter 21 Solutions
Genetics: From Genes to Genomes
Ch. 21 - Choose the best matching phrase in the right...Ch. 21 - When an allele is dominant, why does it not always...Ch. 21 - A population with an allele frequency p of 0.5 and...Ch. 21 - In a certain population of frogs, 120 are green,...Ch. 21 - Which of the following populations are at...Ch. 21 - A dominant mutation in Drosophila called Delta...Ch. 21 - A large, random mating population is started with...Ch. 21 - Prob. 8PCh. 21 - Alkaptonuria is a recessive autosomal genetic...Ch. 21 - Two hypothetical lizard populations found on...
Ch. 21 - It is the year 1998, and the men and women sailors...Ch. 21 - a. Alleles of genes on the X chromosome can also...Ch. 21 - In 1927, the ophthalmologist George Waaler tested...Ch. 21 - The equation p2 2pq q2> = 1 representing the...Ch. 21 - A gene has two alleles A frequency = p and a...Ch. 21 - Some people can taste the bitter compound...Ch. 21 - Androgenetic alopecia pattern baldness is a...Ch. 21 - The following figure shows the FBI-style analysis...Ch. 21 - Why is the elimination of a fully recessive...Ch. 21 - Tristan da Cunha is a group of small islands in...Ch. 21 - Small population size causes genetic drift because...Ch. 21 - Three basic predictions underlie genetic drift in...Ch. 21 - A mouse mutation with incomplete dominance t =...Ch. 21 - In Drosophila, the vestigial wings recessive...Ch. 21 - In a population of infinite size, three loci A, B,...Ch. 21 - You have identified an autosomal gene that...Ch. 21 - In Europe, the frequency of the CF allele causing...Ch. 21 - An allele of the G6PD gene acts in a recessive...Ch. 21 - Explain why evolutionary biologists monitor...Ch. 21 - Tiny foxes live on the Channel Islands off the...Ch. 21 - What is the most straightforward evidence at the...Ch. 21 - In March 2013, the American Journal of Human...Ch. 21 - If you go back 40 generations into your biological...Ch. 21 - In Fig. 21.17, to what part of the world does...Ch. 21 - Predict the DNA sequences at the four nodes...Ch. 21 - A cladogram not drawn to scale for the taxonomic...Ch. 21 - As noted in Fig. 21.22, humans now living in...Ch. 21 - As of this writing in 2016, no Neanderthal-derived...
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