a. To determine: The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b. Introduction: Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

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Answer 1

Question

Chapter 21, Problem 2P

Summary Introduction

a.

To determine:

The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b.

Introduction:

Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

Summary Introduction

b.

To determine:

The reason behind expectancy of seeing phenotypic variance higher than zero for the genetically identical dandelions grown in a constant environment.

Introduction:

Environmental conditions, along with the genomics of an organism, determine the possible phenotypic character of the organism. Change in the environmental conditions changes the expected phenotypic characters to some extent.

Summary Introduction

c.

To determine:

The refined estimate of genetic variance originally shown in Fig. 22.5b using the information obtained in previous parts.

Introduction:

Phenotypic characters in an organism are combined effect of the genetic makeup as well as the environmental conditions around the organism. Change in environmental conditions around two genetically similar organisms changes the phenotypic characters of the organism to some extent.

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Students have asked these similar questions

The phenotypic data below are the shoot lengths of 25 F1 and 25 F2 rice plants at seedling stage, produced from the cross of IR29 and Hasawi rice varieties. The mean lengths of the shoot from IR29 and Hasawi are 23.1 cm and 46.7 cm, respectively. Tabulate and plot the frequency distributions of the F1 and F2 generations. Use the formulas below in the computations. From each distribution calculate the mean, the variance, and the standard error of the mean. Round off answers to two decimal places. What is the main difference between F1 and F2 distributions?

Corn plants from a test plot are measured, and the distribution of heights at 10-cm intervals is recorded in the following table: Height (cm) Plants (no.) 100 20 110 60 120 90 130 130 140 180 150 120 160 70 170 50 180 40 Calculate (a) the mean height, (b) the variance, (c) the standard deviation, and (d) the standard error of the mean. Plot a rough graph of plant height against frequency. Do the values represent a normal distribution? Based on your calculations, how would you assess the variation within this population?

A wide-ranging survey of Nicotonia growing in its natural environment recorded a variation in corolla length ranging from 12mm to 47mm with a variance of 36.5. Subsequently, collected seeds were grown in a greenhouse and it was found that the range was now very much lower with most plants having similar corolla lengths and the variance was now only 8.4. ALL WORKING MUST BE SHOWN a) What is the heritability of corolla length?

Answer 2

Question

Chapter 21, Problem 2P

Summary Introduction

a.

To determine:

The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b.

Introduction:

Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

Summary Introduction

b.

To determine:

The reason behind expectancy of seeing phenotypic variance higher than zero for the genetically identical dandelions grown in a constant environment.

Introduction:

Environmental conditions, along with the genomics of an organism, determine the possible phenotypic character of the organism. Change in the environmental conditions changes the expected phenotypic characters to some extent.

Summary Introduction

c.

To determine:

The refined estimate of genetic variance originally shown in Fig. 22.5b using the information obtained in previous parts.

Introduction:

Phenotypic characters in an organism are combined effect of the genetic makeup as well as the environmental conditions around the organism. Change in environmental conditions around two genetically similar organisms changes the phenotypic characters of the organism to some extent.

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Answer 3

Question

Chapter 21, Problem 2P

Summary Introduction

a.

To determine:

The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b.

Introduction:

Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

Summary Introduction

b.

To determine:

The reason behind expectancy of seeing phenotypic variance higher than zero for the genetically identical dandelions grown in a constant environment.

Introduction:

Environmental conditions, along with the genomics of an organism, determine the possible phenotypic character of the organism. Change in the environmental conditions changes the expected phenotypic characters to some extent.

Summary Introduction

c.

To determine:

The refined estimate of genetic variance originally shown in Fig. 22.5b using the information obtained in previous parts.

Introduction:

Phenotypic characters in an organism are combined effect of the genetic makeup as well as the environmental conditions around the organism. Change in environmental conditions around two genetically similar organisms changes the phenotypic characters of the organism to some extent.

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Answer 4

Question

Chapter 21, Problem 2P

Summary Introduction

a.

To determine:

The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b.

Introduction:

Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

Summary Introduction

b.

To determine:

The reason behind expectancy of seeing phenotypic variance higher than zero for the genetically identical dandelions grown in a constant environment.

Introduction:

Environmental conditions, along with the genomics of an organism, determine the possible phenotypic character of the organism. Change in the environmental conditions changes the expected phenotypic characters to some extent.

Summary Introduction

c.

To determine:

The refined estimate of genetic variance originally shown in Fig. 22.5b using the information obtained in previous parts.

Introduction:

Phenotypic characters in an organism are combined effect of the genetic makeup as well as the environmental conditions around the organism. Change in environmental conditions around two genetically similar organisms changes the phenotypic characters of the organism to some extent.

Expert Solution & Answer

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Answer 5

Chapter 21, Problem 2P

Summary Introduction

a.

To determine:

The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b.

Introduction:

Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

Summary Introduction

b.

To determine:

The reason behind expectancy of seeing phenotypic variance higher than zero for the genetically identical dandelions grown in a constant environment.

Introduction:

Environmental conditions, along with the genomics of an organism, determine the possible phenotypic character of the organism. Change in the environmental conditions changes the expected phenotypic characters to some extent.

Summary Introduction

c.

To determine:

The refined estimate of genetic variance originally shown in Fig. 22.5b using the information obtained in previous parts.

Introduction:

Phenotypic characters in an organism are combined effect of the genetic makeup as well as the environmental conditions around the organism. Change in environmental conditions around two genetically similar organisms changes the phenotypic characters of the organism to some extent.

Answer 6

Chapter 21, Problem 2P

Summary Introduction

a.

To determine:

The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b.

Introduction:

Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

Answer 7

Chapter 21, Problem 2P

Summary Introduction

a.

To determine:

The sketch of the distribution of stem length phenotypic classes that are expected to be seen relative to the distribution given in Figs. 22.5a and 22.5b.

Introduction:

Phenotypic characters of an organism are the physical features that are visible to others. These characters are determined by the genes present in the genetic material of the organism.

Answer 8

Summary Introduction

b.

To determine:

The reason behind expectancy of seeing phenotypic variance higher than zero for the genetically identical dandelions grown in a constant environment.

Introduction:

Environmental conditions, along with the genomics of an organism, determine the possible phenotypic character of the organism. Change in the environmental conditions changes the expected phenotypic characters to some extent.

Answer 9

Summary Introduction

b.

To determine:

The reason behind expectancy of seeing phenotypic variance higher than zero for the genetically identical dandelions grown in a constant environment.

Introduction:

Environmental conditions, along with the genomics of an organism, determine the possible phenotypic character of the organism. Change in the environmental conditions changes the expected phenotypic characters to some extent.

Answer 10

Summary Introduction

c.

To determine:

The refined estimate of genetic variance originally shown in Fig. 22.5b using the information obtained in previous parts.

Introduction:

Phenotypic characters in an organism are combined effect of the genetic makeup as well as the environmental conditions around the organism. Change in environmental conditions around two genetically similar organisms changes the phenotypic characters of the organism to some extent.

Answer 11

Summary Introduction

c.

To determine:

The refined estimate of genetic variance originally shown in Fig. 22.5b using the information obtained in previous parts.

Introduction:

Phenotypic characters in an organism are combined effect of the genetic makeup as well as the environmental conditions around the organism. Change in environmental conditions around two genetically similar organisms changes the phenotypic characters of the organism to some extent.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 21 - Choose the best matching phrase in the right...Ch. 21 - Prob. 2P Ch. 21 - How can each of the following be used in...Ch. 21 - Which of the following statements would be true of...Ch. 21 - Prob. 5P Ch. 21 - Prob. 6P Ch. 21 - Prob. 7P Ch. 21 - Human geneticists have found the Finnish...Ch. 21 - Prob. 9P Ch. 21 - Prob. 10P

Solution Summary: The author explains the phenotypic characters of an organism are determined by the genes present in the genetic material of the organism.

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