Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 20.4, Problem 1CC
Summary Introduction
To analyze: Effects of under expression of gremlin gene in ducks.
Introduction:
Gremlin, which is coded by the gene grem1, is an antagonist of bone morphogenesis proteins (BMPs).
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if you replaced the hox genes that are normally expressed in a dolphin fin with the hox genes that are normally expressed in a cat's paw, you would get a dolphin with kitty cat paws. ( True or false)
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Give examples of genes that affect development in fruit flies by regulating gene expression at the level of (a) transcription and (b) translation.
Chapter 20 Solutions
Principles of Biology
Ch. 20.1 - Prob. 1CCCh. 20.1 - Prob. 1TYKCh. 20.1 - Prob. 2TYKCh. 20.2 - Prob. 1BCCh. 20.2 - Is this an example of a prezygotic or a...Ch. 20.2 - Is this an example of a prezygotic or a...Ch. 20.2 - Prob. 1TYKCh. 20.2 - Which of the following is not an example of a...Ch. 20.3 - Prob. 1BCCh. 20.3 - Prob. 1CC
Ch. 20.3 - Which of the following is an example of allopatric...Ch. 20.3 - Prob. 2TYKCh. 20.4 - Prob. 1CCCh. 20.4 - Prob. 2CCCh. 20.4 - Prob. 1TYKCh. 20 - Macroevolution refers to evolutionary changes that...Ch. 20 - Prob. 2TYCh. 20 - Prob. 3TYCh. 20 - Prob. 4TYCh. 20 - Prob. 5TYCh. 20 - Prob. 6TYCh. 20 - Prob. 7TYCh. 20 - Prob. 8TYCh. 20 - Prob. 9TYCh. 20 - Evolutionary changes in the rate or timing of...Ch. 20 - Prob. 1CCQCh. 20 - Compare and contrast different mechanisms of...Ch. 20 - A principle of biology is that populations of...Ch. 20 - Prob. 1CBQCh. 20 - Discuss the type of speciation (allopatric or...
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- Some uninformed people might argue that studying the development of an obscure little fish like the threespine stickleback is a waste of time and money. Why would biologists study the genes that control development in stickleback fish? Give some reasonsarrow_forwardAs shown in Figure 13-26, the Sonic hedgehog gene is expressed in many places in a developing chicken. Is theidentical Sonic hedgehog protein expressed in each tissue? If so, how do the tissues develop into different structures? If not, how are different Sonic hedgehog proteinsproduced?arrow_forwardWhich term describes the phenomenon that occurs when the expression of one gene pair masks the expression of another gene pair? See Section 4.8 (Page) .arrow_forward
- 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_forwardThere is a gene in the fruit fly (Drosophila) called antennepedia. It controls the formation of which structures? What happens when it isarrow_forwardIn some mites, males pass genes to their grandsons, but they never pass genes to their sons. Explain.arrow_forward
- When in fruit fly development does axes development begin? A. in the unfertilized egg stage when maternal effect genes deposit mRNA and proteins in specific locations B. in the early embryo stage when induction signals between neighboring cells identify where the cells are in three-dimensional space C. in the larval stage when body segments appear, and pattern formation is evident D. in the pupal stage when a gradient of morphogens is establishedarrow_forwardHow does the chromosomal genetic system in animals permit both precise control of gene content and expression in cells and an opportunity for enormous amounts of genetic variation?arrow_forwardWhere are there over 250 species of fruit flies (Drosophila)?arrow_forward
- If a fertilized Drosophila egg is punctured at the anterior end and a small amount of cytoplasm is allowed to leak out, what will be the most likely effect on the development of the fly embryo?arrow_forwardExplain how the presence of Notonecta chemical cues affects gene expression in the Daphniaarrow_forwardIn the late 1980s, this gradient hypothesis was united with a genetic approach to the study of Drosophila embryogenesis. If there were gradients, what were the morphogens whose concentrations changed over space?arrow_forward
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