Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 19.4, Problem 1R
Summary Introduction
To review:
The authenticity of the conserved nature of the developmental genes from the story of the eye-determining genes, Pax6 and eyeless.
Introduction:
Development is the process, by which a simple zygote undergoes a series of changes so as to develop into a much more complex organism. The genes that control the developmental process are much of a concern for biologist as it allows them to study and also decipher the developmental pattern of other organisms as well. These genes can remain conserved within distinctly related species or can encounter changes with the course of evolution.
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Life: The Science of Biology
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- Explain The eyeless/Pax-6/AN gene is crucial for eye development?arrow_forwardWhat is the function of the Pax 6 gene in the mouse eye reference to HOX gene?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_forward
- How 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_forwardCompare and contrast how maternal-effect genes, gap genes, and homeotic genes affect Drosophila development.arrow_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_forward
- Explain the functional roles of maternal-effect genes, gap genes, pair-rule genes, and segment-polarity genes in Drosophila development.arrow_forwardDescribe the inheritance pattern of maternal effect genes. Explainhow the maternal effect occurs at the cellular level. What are theexpected functional roles of the proteins that are encoded bymaternal effect genes?arrow_forwardWhat is the function of a gene (FOXP2) that is rapidly evolving in the human lineage?arrow_forward
- You found a strain of mutant fruit flies (Drosophila) living on the rotten bananas in your dorm room. You notice that many of the larvae have abnormal abdominal segments. You want to know if the “abdomenless” mutation is a maternal effect gene. Describe an experiment you would do to determine this, and the results that would support and contradict the notion that the abdomenless gene encodes a maternal determinant.arrow_forwardExplain hoxA3 and HoxD3 genes are nearly equivalent yet they play distinct roles in the development of mouse.arrow_forwardPrior to the work described here, what was the original purpose ofMorgan’s experiments with Drosophila?arrow_forward
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