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?

Question

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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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10. Your instructor will give you 2 amino acids during the activity session (video 2-7. A. First color all the polar and non-polar covalent bonds in the R groups of your 2 amino acids using the same colors as in #7. Do not color the bonds in the backbone of each amino acid. B. Next, color where all the hydrogen bonds, hydrophobic interactions and ionic bonds could occur in the R group of each amino acid. Use the same colors as in #7. Do not color the bonds in the backbone of each amino acid. C. Position the two amino acids on the page below in an orientation where the two R groups could bond together. Once you are satisfied, staple or tape the amino acids in place and label the bond that you formed between the two R groups. - Polar covalent Bond - Red - Non polar Covalent boND- yellow - Ionic BonD - PINK Hydrogen Bonn - Purple Hydrophobic interaction-green O=C-N H I. H HO H =O CH2 C-C-N HICK H HO H CH2 OH H₂N C = O

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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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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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