Suppose you initiate a screen for maternal-effect mutations in Drosophila affecting external structures of the embryo and you identify more than 100 mutations that affect these structures. From their screenings, other researchers concluded that there are only about 40 maternal-effect genes. How do you reconcile these different results?

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Answer 1

Textbook Question

Chapter 23, Problem 1NST

Suppose you initiate a screen for maternal-effect mutations in Drosophila affecting external structures of the embryo and you identify more than 100 mutations that affect these structures. From their screenings, other researchers concluded that there are only about 40 maternal-effect genes. How do you reconcile these different results?

Expert Solution & Answer

Summary Introduction

To determine: The method in which one can resolve different results of maternal-effect mutations in Drosophila.

Introduction: A person initiates a screen for maternal-effect mutations in Drosophila which affects the external structures of an embryo. A person identifies more than 100 mutations that affect these structures. On the contrary, other researchers found that there are only about 40 maternal-effect genes.

Explanation of Solution

One can identify several different mutations or multiple alleles in some of the same genes. It may be possible that a person’s screen is more inclusive so that one can identify more subtle alterations than the screen of others. A person’s screen may have included some zygotic effect mutations, which depend on the action of maternal-effect genes.

Conclusion

Thus, different results of maternal-effect mutations in Drosophila can be resolved by identifying several different mutations on the same genes.

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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.) Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…

What are Clathrin coated vesicles and what is their function?

Answer 2

Textbook Question

Chapter 23, Problem 1NST

Suppose you initiate a screen for maternal-effect mutations in Drosophila affecting external structures of the embryo and you identify more than 100 mutations that affect these structures. From their screenings, other researchers concluded that there are only about 40 maternal-effect genes. How do you reconcile these different results?

Expert Solution & Answer

Summary Introduction

To determine: The method in which one can resolve different results of maternal-effect mutations in Drosophila.

Introduction: A person initiates a screen for maternal-effect mutations in Drosophila which affects the external structures of an embryo. A person identifies more than 100 mutations that affect these structures. On the contrary, other researchers found that there are only about 40 maternal-effect genes.

Explanation of Solution

One can identify several different mutations or multiple alleles in some of the same genes. It may be possible that a person’s screen is more inclusive so that one can identify more subtle alterations than the screen of others. A person’s screen may have included some zygotic effect mutations, which depend on the action of maternal-effect genes.

Conclusion

Thus, different results of maternal-effect mutations in Drosophila can be resolved by identifying several different mutations on the same genes.

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Answer 3

Textbook Question

Chapter 23, Problem 1NST

Suppose you initiate a screen for maternal-effect mutations in Drosophila affecting external structures of the embryo and you identify more than 100 mutations that affect these structures. From their screenings, other researchers concluded that there are only about 40 maternal-effect genes. How do you reconcile these different results?

Expert Solution & Answer

Summary Introduction

To determine: The method in which one can resolve different results of maternal-effect mutations in Drosophila.

Introduction: A person initiates a screen for maternal-effect mutations in Drosophila which affects the external structures of an embryo. A person identifies more than 100 mutations that affect these structures. On the contrary, other researchers found that there are only about 40 maternal-effect genes.

Explanation of Solution

One can identify several different mutations or multiple alleles in some of the same genes. It may be possible that a person’s screen is more inclusive so that one can identify more subtle alterations than the screen of others. A person’s screen may have included some zygotic effect mutations, which depend on the action of maternal-effect genes.

Conclusion

Thus, different results of maternal-effect mutations in Drosophila can be resolved by identifying several different mutations on the same genes.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 23, Problem 1NST

Suppose you initiate a screen for maternal-effect mutations in Drosophila affecting external structures of the embryo and you identify more than 100 mutations that affect these structures. From their screenings, other researchers concluded that there are only about 40 maternal-effect genes. How do you reconcile these different results?

Expert Solution & Answer

Summary Introduction

To determine: The method in which one can resolve different results of maternal-effect mutations in Drosophila.

Introduction: A person initiates a screen for maternal-effect mutations in Drosophila which affects the external structures of an embryo. A person identifies more than 100 mutations that affect these structures. On the contrary, other researchers found that there are only about 40 maternal-effect genes.

Explanation of Solution

One can identify several different mutations or multiple alleles in some of the same genes. It may be possible that a person’s screen is more inclusive so that one can identify more subtle alterations than the screen of others. A person’s screen may have included some zygotic effect mutations, which depend on the action of maternal-effect genes.

Conclusion

Thus, different results of maternal-effect mutations in Drosophila can be resolved by identifying several different mutations on the same genes.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

To determine: The method in which one can resolve different results of maternal-effect mutations in Drosophila.

Introduction: A person initiates a screen for maternal-effect mutations in Drosophila which affects the external structures of an embryo. A person identifies more than 100 mutations that affect these structures. On the contrary, other researchers found that there are only about 40 maternal-effect genes.

Explanation of Solution

One can identify several different mutations or multiple alleles in some of the same genes. It may be possible that a person’s screen is more inclusive so that one can identify more subtle alterations than the screen of others. A person’s screen may have included some zygotic effect mutations, which depend on the action of maternal-effect genes.

Conclusion

Thus, different results of maternal-effect mutations in Drosophila can be resolved by identifying several different mutations on the same genes.

Answer 8

Expert Solution & Answer

Summary Introduction

To determine: The method in which one can resolve different results of maternal-effect mutations in Drosophila.

Introduction: A person initiates a screen for maternal-effect mutations in Drosophila which affects the external structures of an embryo. A person identifies more than 100 mutations that affect these structures. On the contrary, other researchers found that there are only about 40 maternal-effect genes.

Explanation of Solution

One can identify several different mutations or multiple alleles in some of the same genes. It may be possible that a person’s screen is more inclusive so that one can identify more subtle alterations than the screen of others. A person’s screen may have included some zygotic effect mutations, which depend on the action of maternal-effect genes.

Conclusion

Thus, different results of maternal-effect mutations in Drosophila can be resolved by identifying several different mutations on the same genes.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

To determine: The method in which one can resolve different results of maternal-effect mutations in Drosophila.

Introduction: A person initiates a screen for maternal-effect mutations in Drosophila which affects the external structures of an embryo. A person identifies more than 100 mutations that affect these structures. On the contrary, other researchers found that there are only about 40 maternal-effect genes.

Answer 12

Explanation of Solution

One can identify several different mutations or multiple alleles in some of the same genes. It may be possible that a person’s screen is more inclusive so that one can identify more subtle alterations than the screen of others. A person’s screen may have included some zygotic effect mutations, which depend on the action of maternal-effect genes.

Answer 13

Conclusion

Thus, different results of maternal-effect mutations in Drosophila can be resolved by identifying several different mutations on the same genes.

Answer 14

Ch. 23 - Suppose you initiate a screen for maternal-effect...Ch. 23 - Prob. 2NST Ch. 23 - Prob. 1CS Ch. 23 - Prob. 2CS Ch. 23 - Prob. 1PDQ Ch. 23 - Prob. 2PDQ Ch. 23 - Prob. 3PDQ Ch. 23 - Nuclei from almost any source may be injected into...Ch. 23 - Distinguish between the syncytial blastoderm stage...Ch. 23 - Prob. 6PDQ

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