Explain the role of gene flow in the biological species concept.

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Answer 1

Textbook Question

Chapter 24, Problem 24.1CR

Explain the role of gene flow in the biological species concept.

Expert Solution & Answer

Summary Introduction

To review: The importance of gene flow with respect to the biological species concept.

Introduction:

According to the “Biological species concept”, a group of individuals with interbreeding members to produce a viable offspring is called “species”. “Gene flow” occurs by the transfer of alleles between individuals of a species, and this exchange of alleles tends to hold the individuals together genetically. Human beings are one of the best examples of the “biological species concept”.

Explanation of Solution

In the “biological species concept”, the members of a species become reproductively isolated through prezygotic and postzygotic barriers and thus produce a fertile offspring. These members do not breed with the members of other species. As the interruption of the gene flow is must for the production of a new species, but here the members of different species are not interbreeding; therefore, the gene flow is completely masked between different populations. Hence, in the “biological species concept”, there is a complete absence of gene flow.

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There is a species of eagle, which lives in a tropical forest in Brazil. The alula pattern of its wings is determined by a single autosomal gene with four alleles that exhibit an unknown hierarchy of dominance. Genetic testing shows that individuals 1-1, 11-4, 11-7, III-1, and III-4 are each homozygous. How many possible genotypes among checkered eagles in the population?

Answer 2

Textbook Question

Chapter 24, Problem 24.1CR

Explain the role of gene flow in the biological species concept.

Expert Solution & Answer

Summary Introduction

To review: The importance of gene flow with respect to the biological species concept.

Introduction:

According to the “Biological species concept”, a group of individuals with interbreeding members to produce a viable offspring is called “species”. “Gene flow” occurs by the transfer of alleles between individuals of a species, and this exchange of alleles tends to hold the individuals together genetically. Human beings are one of the best examples of the “biological species concept”.

Explanation of Solution

In the “biological species concept”, the members of a species become reproductively isolated through prezygotic and postzygotic barriers and thus produce a fertile offspring. These members do not breed with the members of other species. As the interruption of the gene flow is must for the production of a new species, but here the members of different species are not interbreeding; therefore, the gene flow is completely masked between different populations. Hence, in the “biological species concept”, there is a complete absence of gene flow.

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Answer 3

Textbook Question

Chapter 24, Problem 24.1CR

Explain the role of gene flow in the biological species concept.

Expert Solution & Answer

Summary Introduction

To review: The importance of gene flow with respect to the biological species concept.

Introduction:

According to the “Biological species concept”, a group of individuals with interbreeding members to produce a viable offspring is called “species”. “Gene flow” occurs by the transfer of alleles between individuals of a species, and this exchange of alleles tends to hold the individuals together genetically. Human beings are one of the best examples of the “biological species concept”.

Explanation of Solution

In the “biological species concept”, the members of a species become reproductively isolated through prezygotic and postzygotic barriers and thus produce a fertile offspring. These members do not breed with the members of other species. As the interruption of the gene flow is must for the production of a new species, but here the members of different species are not interbreeding; therefore, the gene flow is completely masked between different populations. Hence, in the “biological species concept”, there is a complete absence of gene flow.

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03:18

Answer 4

Textbook Question

Chapter 24, Problem 24.1CR

Explain the role of gene flow in the biological species concept.

Expert Solution & Answer

Summary Introduction

To review: The importance of gene flow with respect to the biological species concept.

Introduction:

According to the “Biological species concept”, a group of individuals with interbreeding members to produce a viable offspring is called “species”. “Gene flow” occurs by the transfer of alleles between individuals of a species, and this exchange of alleles tends to hold the individuals together genetically. Human beings are one of the best examples of the “biological species concept”.

Explanation of Solution

In the “biological species concept”, the members of a species become reproductively isolated through prezygotic and postzygotic barriers and thus produce a fertile offspring. These members do not breed with the members of other species. As the interruption of the gene flow is must for the production of a new species, but here the members of different species are not interbreeding; therefore, the gene flow is completely masked between different populations. Hence, in the “biological species concept”, there is a complete absence of gene flow.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

To review: The importance of gene flow with respect to the biological species concept.

Introduction:

According to the “Biological species concept”, a group of individuals with interbreeding members to produce a viable offspring is called “species”. “Gene flow” occurs by the transfer of alleles between individuals of a species, and this exchange of alleles tends to hold the individuals together genetically. Human beings are one of the best examples of the “biological species concept”.

Explanation of Solution

In the “biological species concept”, the members of a species become reproductively isolated through prezygotic and postzygotic barriers and thus produce a fertile offspring. These members do not breed with the members of other species. As the interruption of the gene flow is must for the production of a new species, but here the members of different species are not interbreeding; therefore, the gene flow is completely masked between different populations. Hence, in the “biological species concept”, there is a complete absence of gene flow.

Answer 8

Expert Solution & Answer

Summary Introduction

To review: The importance of gene flow with respect to the biological species concept.

Introduction:

According to the “Biological species concept”, a group of individuals with interbreeding members to produce a viable offspring is called “species”. “Gene flow” occurs by the transfer of alleles between individuals of a species, and this exchange of alleles tends to hold the individuals together genetically. Human beings are one of the best examples of the “biological species concept”.

Explanation of Solution

In the “biological species concept”, the members of a species become reproductively isolated through prezygotic and postzygotic barriers and thus produce a fertile offspring. These members do not breed with the members of other species. As the interruption of the gene flow is must for the production of a new species, but here the members of different species are not interbreeding; therefore, the gene flow is completely masked between different populations. Hence, in the “biological species concept”, there is a complete absence of gene flow.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

To review: The importance of gene flow with respect to the biological species concept.

Introduction:

According to the “Biological species concept”, a group of individuals with interbreeding members to produce a viable offspring is called “species”. “Gene flow” occurs by the transfer of alleles between individuals of a species, and this exchange of alleles tends to hold the individuals together genetically. Human beings are one of the best examples of the “biological species concept”.

Answer 12

Explanation of Solution

In the “biological species concept”, the members of a species become reproductively isolated through prezygotic and postzygotic barriers and thus produce a fertile offspring. These members do not breed with the members of other species. As the interruption of the gene flow is must for the production of a new species, but here the members of different species are not interbreeding; therefore, the gene flow is completely masked between different populations. Hence, in the “biological species concept”, there is a complete absence of gene flow.