Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 23.3, Problem 2CC
Why is it likely that Hox genes have played a major role in the evolution of novel morphological forms?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Which of the following is NOT true regarding Hox genes.
A) The sequence they appear in their corresponding chromosomes is the same order of their expression along the front to back of the developing animal.
B) Homologues of the same Hox genes found in flies can be found in humans.
C) Hox genes are only found in animals with bilateral symmetry.
D) Animals with more complex body plans tend to have more sets of Hox genes through gene duplication events.
How, specifically, is the concept of ALLOMETRY relevant to the phylogenetic position of Homo
floresiensis?
Because if allometry explains the anatomy of Homo floresiensis then we can conclude that it is not
separate species but instead a member of our species.
Although most mammals on islands go through a process of getting smaller, Homo floresiensis evolved from
a smaller ancestor to be bigger, meaning that allometry is an important factor.
Mutations in the allometry allele are associated with many of the characteristics of Homo floresiensis.
Because Homo floresiensis is so much smaller than other members of the genus Homo, it is important to
determine how shape changes associated with smaller size impacted the species.
Because Homo floresiensis had both small- and large-bodied forms, variation within the species is in large
part dictated by allometry.
Which of the following examples from class show that a mutation can have evolutionary benefits?
Group of answer choices
C) Hox mutations that lead to legs developing on fruit flies where antennae should be
A and B
A, B, and C
B) Hox mutations leading to limbs with digits forming from lobe fins
A) Stickleback fish mutation
Chapter 23 Solutions
Campbell Biology in Focus
Ch. 23.1 - Describe an example from the fossil record that...Ch. 23.1 - Your measurements indicate that a fossilized skull...Ch. 23.1 - WHAT IF? What might a fossil record of life today...Ch. 23.2 - Explain the consequences of plate tectonics for...Ch. 23.2 - Prob. 2CCCh. 23.2 - What factors promote adaptive radiations?Ch. 23.2 - Prob. 4CCCh. 23.3 - Explain how new body forms can originate by...Ch. 23.3 - Why is it likely that Hox genes have played a...Ch. 23.3 - MAKE CONNECTIONS Given that changes in morphology...
Ch. 23.4 - How can the Darwinian concept of descent with...Ch. 23.4 - Prob. 2CCCh. 23 - Which factor most likely caused animals and plants...Ch. 23 - Adaptive radiations can be a direct consequence of...Ch. 23 - A researcher discovers a fossil of what appears to...Ch. 23 - A genetic change that caused a certain Hox gene to...Ch. 23 - A swim bladder is a gas-filled sac that helps fish...Ch. 23 - SCIENTIFIC INQUIRY Herbivory (plant eating) has...Ch. 23 - FOCUS ON EVOLUTION Describe how gene flow, genetic...Ch. 23 - FOCUS ON ORGANIZATION You have seen many examples...Ch. 23 - SYNTHESIZE YOUR KNOWLEDGE In 2010, the Soufriere...
Additional Science Textbook Solutions
Find more solutions based on key concepts
An aluminum calorimeter with a mass of 100 g contains 250 g of water. The calorimeter and water are in thermal ...
Physics for Scientists and Engineers
Calculate the lattice energy of CaCl2 using a Born-Haber cycle and data from Appendices F and L and Table 7.5. ...
Chemistry & Chemical Reactivity
What process causes the Mediterranean intermediate Water MIW to become more dense than water in the adjacent At...
Applications and Investigations in Earth Science (9th Edition)
Describe the role and impact of microbes on the earth.
Microbiology Fundamentals: A Clinical Approach
On what molecule does the anticodon appear? Explain the role of this molecule in protein synthesis.
Human Physiology: An Integrated Approach (8th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- An adult human has a flat face with a small jaw and large cranium. An adult chimpanzee has a large jaw and small cranium. Both juvenile chimps and humans have heads similar to adult humans. Which of the following is a reasonable explanation for this pattern? Group of answer choices A) genes that modify skull shape are not expressed in chimps during development B) head shape is controlled by cytoplasmic determinants C)genes that modify skull shape are not expressed in humans during development D) chimps and humans have completely different genes controlling the formation of the headarrow_forwardWhich gene family was found to control the development and differentiation of limbs in vertebrate lineages? A) Hox B) Sonic hedgehog C) Noggin D) Eyelessarrow_forwardRunt is a Drosophila gene involved in development. Mutation of runt leads to an embryonic lethal phenotype in which every other segment in the body plan is missing. What class of developmental genes does runt belong to? O a) Pair-rule genes O b) Segment polarity genes Oc) Homeotic genes O d) Gap genesarrow_forward
- If mutations such as those of the Ubx gene can drastically change morphology in a single step, why do most evolutionary biologists maintain that modification of existingtraits and the evolution of novel characters have generally proceeded by successive small steps?arrow_forwardSome people think that many of our uniquely human traits arose by sexual selection. Over thousands of years, women attracted to charming, witty men perhaps prompted the development of human intellect beyond what was necessary for mere survival. Men attracted to women with juvenile features may have shifted the species as a whole to be less hairy and softer featured than any of our simian relatives. Can you think of a way to test these hypotheses?arrow_forward6) The lens of the vertebrate eye develops only after the head ectoderm comes in contact with the optic cup. This is an example of A) Determination B) Differentiation C) Pattern formation D) Induction 5) The evolutionary process most likely to account for the fixation of neutral or even non-adaptive genes or gene combinations in small populations is called A) Darwinian selection B) Recombination C) Mutation D) Genetic driftarrow_forward
- The first modern humans evolved in Africa. a) What are two kinds of evidence supporting that conclusion, one based on data from living individuals and one from some other source of data? b) What are some unique anatomic and behavioral traits that are unique to hominid species compared to primates, and to Homo sapiens in particular, compared to other hominid species?arrow_forwardplace the evolutionary steps that led to complex multicellularity in the order in which they thought to have occurred. a) The ability of cells to stick to each other b) Differential gene expression in cells c) The ability to communicate between cells d) The ability to move molecules by bulk flowarrow_forwardConsidering the evolution of species, could a gene that is conserved from yeast to humans have evolved to confer some of the complex traits that we observe in modern animals, like multicellularity? Briefly explain.arrow_forward
- Which of the following best describes the evolution of smell in chordates? A) Ancestrally, jawless fish had few ancestral scent genes that coded for receptors resembling a combination of water and air receptors. Subsequently these genes were duplicated and specialized through natural selection either for use in water or air. B) Ancestrally, all olfactory receptors where specialized for water as the ancestor of all vertebrates was aquatic. Only once did olfactory genes become duplicated and specialized and this was in the transition to land for receptors that work in air. C) All chordates share the same number of scent receptor genes. However, they have become variously deactivated through natural selection due to either unuse or a tradeoff for sight genes. D) None of the above.arrow_forwardRegarding the evolution of the mammalian inner ear, the above diagram shows:A) the co-option of jaw bones (colored) for use in hearingB) the loss of jaw bones (colored) and the origin of de-novo hearing bones C) the evolution of synapsids, which have little to do with mammalian evolutionD) the results of a population bottleneck which led to the fixation of odd alleles for ear developmentarrow_forwardPLEASE ANSWER THE QUESTION AND EXPLAIN SUCCINTLY IN 2 SENTENCESarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Mechanisms of Genetic Change or Evolution; Author: Scientist Cindy;https://www.youtube.com/watch?v=5FE8WvGzS4Q;License: Standard Youtube License