Heterochrony is a. the alteration of the spatial pattern of gene expression. b. a change in the relative position of a body part. c. a change in the relative timing of developmental events. d. a change in a signaling pathway.

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 25, Problem 1U

Heterochrony is

a. the alteration of the spatial pattern of gene expression.

b. a change in the relative position of a body part.

c. a change in the relative timing of developmental events.

d. a change in a signaling pathway.

Expert Solution & Answer

Summary Introduction

Introduction:

Changes in the development, contribute towards the evolution. The species which are closely related differ from each other because of the genetic changes. These genetic changes lead to differences in their developmental pattern, which result in producing different phenotype. The types of these developmental changes include homeosis and heterochrony.

Answer to Problem 1U

Correct answer:

The alterations in the timing of developmental events due to genetic changes are called heterochrony. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

When the transcription factors are modified during evolution, they bring changes in the gene function. These changes in genes bring alterations in the timing of developmental events. Such modifications are known as heterochrony.

Option c. is given as "a change in the relative timing of developmental events".

As, “in heterochronic mutations, alterations in the timing of developmental events take place as a result of evolutionary changes in the genes”, is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “the alteration of the spatial pattern of gene expression”.

The alterations in the spatial pattern of gene expression, is a type of homeosis. So, it is a wrong answer.

Option b. is given as “a change in the relative position of a body part.”

Change in the relative position of a body part is a type of homeotic mutation, which does not produce a phenotype which is viable. So, it is a wrong answer.

Option d. is given as “a change in the signaling pathway”.

Change in the signaling pathway, results in the appearance of a homeotic phenotype. So, it is a wrong answer.

Hence, options a, b and d are incorrect.

Conclusion

A change in the relative timing of developmental events is known as heterochrony.

Want to see more full solutions like this?

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

Students have asked these similar questions

An urgent care center experienced the average patient admissions shown in the Table below during the weeks from the first week of December through the second week of April. Week Average Daily Admissions 1-Dec 11 2-Dec 14 3-Dec 17 4-Dec 15 1-Jan 12 2-Jan 11 3-Jan 9 4-Jan 9 1-Feb 12 2-Feb 8 3-Feb 13 4-Feb 11 1-Mar 15 2-Mar 17 3-Mar 14 4-Mar 19 5-Mar 13 1-Apr 17 2-Apr 13 Forecast admissions for the periods from the first week of December through the second week of April. Compare the forecast admissions to the actual admissions; What do you conclude?

Analyze the effectiveness of the a drug treatment program based on the needs of 18-65 year olds who are in need of treatment by critically describing 4 things in the program is doing effectively and 4 things the program needs some improvement.

I have the first half finished... just need the bottom half.

Answer 2

Textbook Question

Chapter 25, Problem 1U

Heterochrony is

a. the alteration of the spatial pattern of gene expression.

b. a change in the relative position of a body part.

c. a change in the relative timing of developmental events.

d. a change in a signaling pathway.

Expert Solution & Answer

Summary Introduction

Introduction:

Changes in the development, contribute towards the evolution. The species which are closely related differ from each other because of the genetic changes. These genetic changes lead to differences in their developmental pattern, which result in producing different phenotype. The types of these developmental changes include homeosis and heterochrony.

Answer to Problem 1U

Correct answer:

The alterations in the timing of developmental events due to genetic changes are called heterochrony. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

When the transcription factors are modified during evolution, they bring changes in the gene function. These changes in genes bring alterations in the timing of developmental events. Such modifications are known as heterochrony.

Option c. is given as "a change in the relative timing of developmental events".

As, “in heterochronic mutations, alterations in the timing of developmental events take place as a result of evolutionary changes in the genes”, is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “the alteration of the spatial pattern of gene expression”.

The alterations in the spatial pattern of gene expression, is a type of homeosis. So, it is a wrong answer.

Option b. is given as “a change in the relative position of a body part.”

Change in the relative position of a body part is a type of homeotic mutation, which does not produce a phenotype which is viable. So, it is a wrong answer.

Option d. is given as “a change in the signaling pathway”.

Change in the signaling pathway, results in the appearance of a homeotic phenotype. So, it is a wrong answer.

Hence, options a, b and d are incorrect.

Conclusion

A change in the relative timing of developmental events is known as heterochrony.

Want to see more full solutions like this?

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

Answer 3

Textbook Question

Chapter 25, Problem 1U

Heterochrony is

a. the alteration of the spatial pattern of gene expression.

b. a change in the relative position of a body part.

c. a change in the relative timing of developmental events.

d. a change in a signaling pathway.

Expert Solution & Answer

Summary Introduction

Introduction:

Changes in the development, contribute towards the evolution. The species which are closely related differ from each other because of the genetic changes. These genetic changes lead to differences in their developmental pattern, which result in producing different phenotype. The types of these developmental changes include homeosis and heterochrony.

Answer to Problem 1U

Correct answer:

The alterations in the timing of developmental events due to genetic changes are called heterochrony. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

When the transcription factors are modified during evolution, they bring changes in the gene function. These changes in genes bring alterations in the timing of developmental events. Such modifications are known as heterochrony.

Option c. is given as "a change in the relative timing of developmental events".

As, “in heterochronic mutations, alterations in the timing of developmental events take place as a result of evolutionary changes in the genes”, is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “the alteration of the spatial pattern of gene expression”.

The alterations in the spatial pattern of gene expression, is a type of homeosis. So, it is a wrong answer.

Option b. is given as “a change in the relative position of a body part.”

Change in the relative position of a body part is a type of homeotic mutation, which does not produce a phenotype which is viable. So, it is a wrong answer.

Option d. is given as “a change in the signaling pathway”.

Change in the signaling pathway, results in the appearance of a homeotic phenotype. So, it is a wrong answer.

Hence, options a, b and d are incorrect.

Conclusion

A change in the relative timing of developmental events is known as heterochrony.

Want to see more full solutions like this?

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

Answer 4

Textbook Question

Chapter 25, Problem 1U

Heterochrony is

a. the alteration of the spatial pattern of gene expression.

b. a change in the relative position of a body part.

c. a change in the relative timing of developmental events.

d. a change in a signaling pathway.

Expert Solution & Answer

Summary Introduction

Introduction:

Changes in the development, contribute towards the evolution. The species which are closely related differ from each other because of the genetic changes. These genetic changes lead to differences in their developmental pattern, which result in producing different phenotype. The types of these developmental changes include homeosis and heterochrony.

Answer to Problem 1U

Correct answer:

The alterations in the timing of developmental events due to genetic changes are called heterochrony. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

When the transcription factors are modified during evolution, they bring changes in the gene function. These changes in genes bring alterations in the timing of developmental events. Such modifications are known as heterochrony.

Option c. is given as "a change in the relative timing of developmental events".

As, “in heterochronic mutations, alterations in the timing of developmental events take place as a result of evolutionary changes in the genes”, is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “the alteration of the spatial pattern of gene expression”.

The alterations in the spatial pattern of gene expression, is a type of homeosis. So, it is a wrong answer.

Option b. is given as “a change in the relative position of a body part.”

Change in the relative position of a body part is a type of homeotic mutation, which does not produce a phenotype which is viable. So, it is a wrong answer.

Option d. is given as “a change in the signaling pathway”.

Change in the signaling pathway, results in the appearance of a homeotic phenotype. So, it is a wrong answer.

Hence, options a, b and d are incorrect.

Conclusion

A change in the relative timing of developmental events is known as heterochrony.

Want to see more full solutions like this?

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

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

Changes in the development, contribute towards the evolution. The species which are closely related differ from each other because of the genetic changes. These genetic changes lead to differences in their developmental pattern, which result in producing different phenotype. The types of these developmental changes include homeosis and heterochrony.

Answer to Problem 1U

Correct answer:

The alterations in the timing of developmental events due to genetic changes are called heterochrony. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

When the transcription factors are modified during evolution, they bring changes in the gene function. These changes in genes bring alterations in the timing of developmental events. Such modifications are known as heterochrony.

Option c. is given as "a change in the relative timing of developmental events".

As, “in heterochronic mutations, alterations in the timing of developmental events take place as a result of evolutionary changes in the genes”, is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “the alteration of the spatial pattern of gene expression”.

The alterations in the spatial pattern of gene expression, is a type of homeosis. So, it is a wrong answer.

Option b. is given as “a change in the relative position of a body part.”

Change in the relative position of a body part is a type of homeotic mutation, which does not produce a phenotype which is viable. So, it is a wrong answer.

Option d. is given as “a change in the signaling pathway”.

Change in the signaling pathway, results in the appearance of a homeotic phenotype. So, it is a wrong answer.

Hence, options a, b and d are incorrect.

Conclusion

A change in the relative timing of developmental events is known as heterochrony.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

Changes in the development, contribute towards the evolution. The species which are closely related differ from each other because of the genetic changes. These genetic changes lead to differences in their developmental pattern, which result in producing different phenotype. The types of these developmental changes include homeosis and heterochrony.

Answer to Problem 1U

Correct answer:

The alterations in the timing of developmental events due to genetic changes are called heterochrony. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

When the transcription factors are modified during evolution, they bring changes in the gene function. These changes in genes bring alterations in the timing of developmental events. Such modifications are known as heterochrony.

Option c. is given as "a change in the relative timing of developmental events".

As, “in heterochronic mutations, alterations in the timing of developmental events take place as a result of evolutionary changes in the genes”, is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “the alteration of the spatial pattern of gene expression”.

The alterations in the spatial pattern of gene expression, is a type of homeosis. So, it is a wrong answer.

Option b. is given as “a change in the relative position of a body part.”

Change in the relative position of a body part is a type of homeotic mutation, which does not produce a phenotype which is viable. So, it is a wrong answer.

Option d. is given as “a change in the signaling pathway”.

Change in the signaling pathway, results in the appearance of a homeotic phenotype. So, it is a wrong answer.

Hence, options a, b and d are incorrect.

Conclusion

A change in the relative timing of developmental events is known as heterochrony.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

Changes in the development, contribute towards the evolution. The species which are closely related differ from each other because of the genetic changes. These genetic changes lead to differences in their developmental pattern, which result in producing different phenotype. The types of these developmental changes include homeosis and heterochrony.

Answer 12

Answer to Problem 1U

Correct answer:

The alterations in the timing of developmental events due to genetic changes are called heterochrony. Therefore, option c. is correct.

Answer 13

Explanation of Solution

Reason for the correct statement:

When the transcription factors are modified during evolution, they bring changes in the gene function. These changes in genes bring alterations in the timing of developmental events. Such modifications are known as heterochrony.

Option c. is given as "a change in the relative timing of developmental events".

As, “in heterochronic mutations, alterations in the timing of developmental events take place as a result of evolutionary changes in the genes”, is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “the alteration of the spatial pattern of gene expression”.

The alterations in the spatial pattern of gene expression, is a type of homeosis. So, it is a wrong answer.

Option b. is given as “a change in the relative position of a body part.”

Change in the relative position of a body part is a type of homeotic mutation, which does not produce a phenotype which is viable. So, it is a wrong answer.

Option d. is given as “a change in the signaling pathway”.

Change in the signaling pathway, results in the appearance of a homeotic phenotype. So, it is a wrong answer.

Hence, options a, b and d are incorrect.