Chlamydomonas , a eukaryoric green alga, may be sensitive to the antibiotic erythromycin, which inhibits protein synthesis in bacteria. There are two mating types in this alga, mt + and mt – . If an mt + cell sensitive to the antibiotic is crossed with an mt – cell that is resistant, all progeny cells are sensitive. The reciprocal cross ( mt + resistant and mt – sensitive) yields all resistant progeny cells. Assuming that the mutation for resistance is in the chloroplast DNA, what can you conclude from the results of these crosses?

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Answer 1

Textbook Question

Chapter 9, Problem 1NST

Chlamydomonas, a eukaryoric green alga, may be sensitive to the antibiotic erythromycin, which inhibits protein synthesis in bacteria. There are two mating types in this alga, mt⁺ and mt^–. If an mt⁺ cell sensitive to the antibiotic is crossed with an mt^– cell that is resistant, all progeny cells are sensitive. The reciprocal cross (mt⁺ resistant and mt^– sensitive) yields all resistant progeny cells. Assuming that the mutation for resistance is in the chloroplast DNA, what can you conclude from the results of these crosses?

Expert Solution & Answer

Summary Introduction

To determine: The conclusion that can be drawn from the results of the given crosses.

Introduction: Chlamydomonas is a eukaryotic green alga and shows two mating types mt⁺ and mt^-. The cross between mt⁺ cell (sensitive to antibiotic) and mt^- cell (resistant to antibiotic) produces sensitive progeny cells.

Explanation of Solution

The following conclusions can be drawn from the results of the given crosses:

The mt⁺ strain of Chlamydomonas is the donor of the chloroplast DNA. This is because the inheritance of resistance or sensitivity to the antibiotic relies on the status of mt⁺ gene.
In Chlamydomonas, the chloroplasts obtain their features from mt⁺, whereas mitochondria obtain their features from the mt^- strain.

Conclusion

Thus, mt⁺ strain is the donor of chloroplast DNA and the chloroplasts gain their characteristics from mt⁺. The mitochondria obtain their features from mt^-.

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Answer 2

Textbook Question

Chapter 9, Problem 1NST

Chlamydomonas, a eukaryoric green alga, may be sensitive to the antibiotic erythromycin, which inhibits protein synthesis in bacteria. There are two mating types in this alga, mt⁺ and mt^–. If an mt⁺ cell sensitive to the antibiotic is crossed with an mt^– cell that is resistant, all progeny cells are sensitive. The reciprocal cross (mt⁺ resistant and mt^– sensitive) yields all resistant progeny cells. Assuming that the mutation for resistance is in the chloroplast DNA, what can you conclude from the results of these crosses?

Expert Solution & Answer

Summary Introduction

To determine: The conclusion that can be drawn from the results of the given crosses.

Introduction: Chlamydomonas is a eukaryotic green alga and shows two mating types mt⁺ and mt^-. The cross between mt⁺ cell (sensitive to antibiotic) and mt^- cell (resistant to antibiotic) produces sensitive progeny cells.

Explanation of Solution

The following conclusions can be drawn from the results of the given crosses:

The mt⁺ strain of Chlamydomonas is the donor of the chloroplast DNA. This is because the inheritance of resistance or sensitivity to the antibiotic relies on the status of mt⁺ gene.
In Chlamydomonas, the chloroplasts obtain their features from mt⁺, whereas mitochondria obtain their features from the mt^- strain.

Conclusion

Thus, mt⁺ strain is the donor of chloroplast DNA and the chloroplasts gain their characteristics from mt⁺. The mitochondria obtain their features from mt^-.

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Answer 3

Textbook Question

Chapter 9, Problem 1NST

Chlamydomonas, a eukaryoric green alga, may be sensitive to the antibiotic erythromycin, which inhibits protein synthesis in bacteria. There are two mating types in this alga, mt⁺ and mt^–. If an mt⁺ cell sensitive to the antibiotic is crossed with an mt^– cell that is resistant, all progeny cells are sensitive. The reciprocal cross (mt⁺ resistant and mt^– sensitive) yields all resistant progeny cells. Assuming that the mutation for resistance is in the chloroplast DNA, what can you conclude from the results of these crosses?

Expert Solution & Answer

Summary Introduction

To determine: The conclusion that can be drawn from the results of the given crosses.

Introduction: Chlamydomonas is a eukaryotic green alga and shows two mating types mt⁺ and mt^-. The cross between mt⁺ cell (sensitive to antibiotic) and mt^- cell (resistant to antibiotic) produces sensitive progeny cells.

Explanation of Solution

The following conclusions can be drawn from the results of the given crosses:

The mt⁺ strain of Chlamydomonas is the donor of the chloroplast DNA. This is because the inheritance of resistance or sensitivity to the antibiotic relies on the status of mt⁺ gene.
In Chlamydomonas, the chloroplasts obtain their features from mt⁺, whereas mitochondria obtain their features from the mt^- strain.

Conclusion

Thus, mt⁺ strain is the donor of chloroplast DNA and the chloroplasts gain their characteristics from mt⁺. The mitochondria obtain their features from mt^-.

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Answer 4

Textbook Question

Chapter 9, Problem 1NST

Chlamydomonas, a eukaryoric green alga, may be sensitive to the antibiotic erythromycin, which inhibits protein synthesis in bacteria. There are two mating types in this alga, mt⁺ and mt^–. If an mt⁺ cell sensitive to the antibiotic is crossed with an mt^– cell that is resistant, all progeny cells are sensitive. The reciprocal cross (mt⁺ resistant and mt^– sensitive) yields all resistant progeny cells. Assuming that the mutation for resistance is in the chloroplast DNA, what can you conclude from the results of these crosses?

Expert Solution & Answer

Summary Introduction

To determine: The conclusion that can be drawn from the results of the given crosses.

Introduction: Chlamydomonas is a eukaryotic green alga and shows two mating types mt⁺ and mt^-. The cross between mt⁺ cell (sensitive to antibiotic) and mt^- cell (resistant to antibiotic) produces sensitive progeny cells.

Explanation of Solution

The following conclusions can be drawn from the results of the given crosses:

The mt⁺ strain of Chlamydomonas is the donor of the chloroplast DNA. This is because the inheritance of resistance or sensitivity to the antibiotic relies on the status of mt⁺ gene.
In Chlamydomonas, the chloroplasts obtain their features from mt⁺, whereas mitochondria obtain their features from the mt^- strain.

Conclusion

Thus, mt⁺ strain is the donor of chloroplast DNA and the chloroplasts gain their characteristics from mt⁺. The mitochondria obtain their features from mt^-.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

To determine: The conclusion that can be drawn from the results of the given crosses.

Introduction: Chlamydomonas is a eukaryotic green alga and shows two mating types mt⁺ and mt^-. The cross between mt⁺ cell (sensitive to antibiotic) and mt^- cell (resistant to antibiotic) produces sensitive progeny cells.

Explanation of Solution

The following conclusions can be drawn from the results of the given crosses:

The mt⁺ strain of Chlamydomonas is the donor of the chloroplast DNA. This is because the inheritance of resistance or sensitivity to the antibiotic relies on the status of mt⁺ gene.
In Chlamydomonas, the chloroplasts obtain their features from mt⁺, whereas mitochondria obtain their features from the mt^- strain.

Conclusion

Thus, mt⁺ strain is the donor of chloroplast DNA and the chloroplasts gain their characteristics from mt⁺. The mitochondria obtain their features from mt^-.

Answer 8

Expert Solution & Answer

Summary Introduction

To determine: The conclusion that can be drawn from the results of the given crosses.

Introduction: Chlamydomonas is a eukaryotic green alga and shows two mating types mt⁺ and mt^-. The cross between mt⁺ cell (sensitive to antibiotic) and mt^- cell (resistant to antibiotic) produces sensitive progeny cells.

Explanation of Solution

The following conclusions can be drawn from the results of the given crosses:

The mt⁺ strain of Chlamydomonas is the donor of the chloroplast DNA. This is because the inheritance of resistance or sensitivity to the antibiotic relies on the status of mt⁺ gene.
In Chlamydomonas, the chloroplasts obtain their features from mt⁺, whereas mitochondria obtain their features from the mt^- strain.

Conclusion

Thus, mt⁺ strain is the donor of chloroplast DNA and the chloroplasts gain their characteristics from mt⁺. The mitochondria obtain their features from mt^-.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

To determine: The conclusion that can be drawn from the results of the given crosses.

Introduction: Chlamydomonas is a eukaryotic green alga and shows two mating types mt⁺ and mt^-. The cross between mt⁺ cell (sensitive to antibiotic) and mt^- cell (resistant to antibiotic) produces sensitive progeny cells.

Answer 12

Explanation of Solution

The following conclusions can be drawn from the results of the given crosses:

The mt⁺ strain of Chlamydomonas is the donor of the chloroplast DNA. This is because the inheritance of resistance or sensitivity to the antibiotic relies on the status of mt⁺ gene.
In Chlamydomonas, the chloroplasts obtain their features from mt⁺, whereas mitochondria obtain their features from the mt^- strain.

Answer 13

Conclusion

Thus, mt⁺ strain is the donor of chloroplast DNA and the chloroplasts gain their characteristics from mt⁺. The mitochondria obtain their features from mt^-.

Answer 14

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