Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
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Chapter 22, Problem 1TYU

The largest unit within which gene flow can readily occur is a

  1. A.    population.
  2. B.     species.
  3. C.     genus.
  4. D.    hybrid.
Expert Solution & Answer
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Summary Introduction

Introduction:

Species is the particular group of organisms that share similar trait with each other and are able to produce viable offspring when they mate with each other.

Answer to Problem 1TYU

Correct answer:

The largest unit within which gene flow can readily occur is the species. Therefore, option (B) is correct.

Explanation of Solution

Reason for the correct statement:

Species is the highest group in which the production of viable offspring is possible that aids in gene flow.

Option (B) is given as “species”.

As “the largest unit within which gene flow can readily occur is the species” it is the right answer.

Hence, option (B) is correct.

Reason for the incorrect statement:

Option (A) is given as “population”.

Population involves the group of different genus that are not able to interbreed. So, it is a wrong answer.

Option (C) is given as “genus”.

Genus is the group of organism that share similar traits but might not be able to produce viable offsprings. So, it is a wrong answer.

Option (D) is given as “hybrid”.

Hybrid is the group of organism that shares the traits of two different species of the organism. So, it is a wrong answer.

Hence, options (A), (C), and (D) are incorrect.

Conclusion

The largest unit within which gene flow can readily occur is the species.

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Students have asked these similar questions
If reinforcement is weak and hybrids are not completely infertile, a. genetic divergence between populations may be overcome by gene flow. b. speciation will occur 100% of the time. c. gene flow between populations will be impossible. d. the speciation will be more likely than if hybrids were completely infertile.
Problems with the biological species concept include the fact that a. many species reproduce asexually. b. postzygotic isolating mechanisms decrease hybrid viability. c. prezygotic isolating mechanisms are extremely rare. d. All of the choices are correct.
Gene flow occurs a. when individuals within a population interbreed. b. as a result of genetic drift. c. as a result of mutations in one population but not in another. d. when an individual migrates between two otherwise isolated populations of a species.
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