Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Chapter 24, Problem 1S
The FOX2 gene is associated with speech in human. It is also found in chimpanzees, gorillas, orangutans, rhesus macaques, and even the mouse, yet none of these mammals speak. Develop a hypothesis that explains whyFOXP2 supports speech in humans but not other mammals.
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Chapter 24 Solutions
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- Which statement about Hox genes is false? a. They are expressed in similar patterns in the embryos of both mice and flies. b. They include a conserved region of base pairs called the homeobox. c. They are arranged in similar clusters of genes in both mice and flies. d. They are part of the so-called genetic toolkit. e. Because of their important functional roles, they evolved rapidly in both mammals and flies.arrow_forwardWhich specialized gene product is responsible for the fusion of mononucleated skin fibroblasts into multinucleated skeletal muscle cells in humans (a type of positive feedback in gene expression)? the glucocorticoid receptor protein the antennapedia protein the PAX-6 protein the MyoD protein the Ey proteinarrow_forwardSome of the mammalian Hox genes have been shown tobe more similar to one of the insect Hox genes than to theothers. Describe an experimental approach that wouldenable you to demonstrate this finding in a functionaltest in living flies.arrow_forward
- The homeotic mutation Antennapedia causes mutant Drosophila to have legs in place of antennae and is a dominant gain-of-function mutation. List all the properties of such mutations. How does the Antennapedia gene change antennae into legs?arrow_forwardgiven a situation in which you manipulated a zebrafish embryo by injecting high levels of retinoic acid so that no anterior genes will be expressed. Surprisingly, after embryonic development, you are still able to observed the presence of anterior structures. What could explain this observation? What changes in your experiment would you make to achieve your objective?arrow_forwardHow many globin genes are present in mammals? What is the evidence indicating that all the globin genes in the mammalian genome are part of a family derived from a common ancestral globin gene?arrow_forward
- The FOXP2 gene is sometimes called the “language gene.” Why is this name inaccurate?arrow_forwardWhat is Sonic hedgehog, and why it is important? Sonic hedgehog is a protein in humans that is encoded bybthe SHH gene. It plays a key role in the development of animals as distantly related as insects and mammals.arrow_forwarddescribe the arrangment of Hox genes on each chromosome in mammals in relation to their expression pattern. What effect would you expect if you expressed a Hox gene more anterior to its normal expression domain?arrow_forward
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