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

Skip to main content close Homework Help is Here – Start Your Trial Now! arrow_forward search SEARCH ASK Human Anatomy & Physiology (11th Edition)BUY Human Anatomy & Physiology (11th Edition) 11th Edition ISBN: 9780134580999 Author: Elaine N. Marieb, Katja N. Hoehn Publisher: PEARSON 1 The Human Body: An Orientation expand_moreChapter 1 : The Human Body: An Orientation Chapter Questions expand_moreSection: Chapter Questions Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,... format_list_bulletedProblem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,... See similar textbooks Bartleby Related Questions Icon Related questions Bartleby Expand Icon bartleby Concept explainers bartleby Question Draw a replication bubble with two replication forks.blue lines are DNA single strands and red lines are RNA single strands.indicate all 3' and 5’ ends on all DNA single…

Provide an answer

Question 4 1 pts Which of the following would be most helpful for demonstrating alternative splicing for a new organism? ○ its proteome and its transcriptome only its transcriptome only its genome its proteome and its genome

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.