When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

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Chapter 21, Problem 2A

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When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

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Three of the many recessive mutations in Drosophila melanogaster that affect body color, wing shape, or bristle morphology are black (b) body versus grey in wild type, dumpy (dp), obliquely truncated wings versus long wings in the male, and hooked (hk) bristles versus not hooked in the wild type. From a cross of a dumpy female with a black and hooked male, all of the F1 were wild type for all three of the characters. The testcross of an F1 female with a dumpy, black, hooked male gave the following results: Trait Number of individuals Wild type 169 Black 19 Black, hooked 301 Dumpy, hooked 21 Hooked, dumpy, black 172 Dumpy, black 6 Dumpy 305 Hooked 8 Determine the order of the genes and the mapping distance between genes. Determine the coefficient of confidence for the portion of the chromosome involved in the cross. How much interference takes place in the cross?

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Genes at loci f, m, and w are linked, but their order is unknown. The F1 heterozygotes from a cross of FFMMWW x ffmmww are test crossed. The most frequent phenotypes in the test cross progeny will be FMW and fmw regardless of what the gene order turns out to be. What classes of testcross progeny (phenotypes) would be least frequent if locus m is in the middle? What classes would be least frequent if locus f is in the middle? What classes would be least frequent if locus w is in the middle?

Answer 2

Question

Chapter 21, Problem 2A

Summary Introduction

Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

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Answer 3

Question

Chapter 21, Problem 2A

Summary Introduction

Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

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Answer 4

Question

Chapter 21, Problem 2A

Summary Introduction

Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

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Answer 5

Chapter 21, Problem 2A

Summary Introduction

Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

Answer 6

Chapter 21, Problem 2A

Summary Introduction

Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

Answer 7

Chapter 21, Problem 2A

Summary Introduction

Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

Answer 8

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Answer 11

Ch. 21.1 - Prob. 1LO Ch. 21.1 - Prob. 2LO Ch. 21.2 - Prob. 1LO Ch. 21.2 - Distinguish between demonstrating that evolution...Ch. 21.3 - Contrast the processes of artificial and natural...Ch. 21.3 - Prob. 2LO Ch. 21.4 - Prob. 1LO Ch. 21.4 - Prob. 2LO Ch. 21.4 - Prob. 3LO Ch. 21.5 - Explain the evolutionary significance of...

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

Solution Summary: The author explains that artificial selection can be of three types: stabilizing, directional, and disruptive. The experiment leads to the deviation of mean bristle number to two opposite extremes.

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Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

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Chapter 21 Solutions

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

Solution Summary: The author explains that artificial selection can be of three types: stabilizing, directional, and disruptive. The experiment leads to the deviation of mean bristle number to two opposite extremes.

Concept explainers

Videos

Introduction: When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.

Want to see the full answer?

Chapter 21 Solutions

Introduction:

When variations are brought in a population under controlled human vigilance the new population that has formed is said to have been selected artificially. Selection (natural or artificial) can be of three types: stabilizing, directional, and disruptive.