The number of red axial flowers in F2 offspring among 100 outcomes. Introduction: According to Mendelian inheritance , a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous conditions.

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Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 13GP

Summary Introduction

To determine: The number of red axial flowers in F2 offspring among 100 outcomes.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous conditions.

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A type of tomato (Solanum lycopersicum) produces fruit in three possible colors: red, green, and orange. You cross a true-breeding orange-fruited plant with a true-breeding green-fruited plant, and all the F1 offspring are red. You intercross the red F1s, and the resulting F2 generation consists of 108 red-, 40 orange-, and 44 green-fruited plants. 1) What type of epistasis is acting (dominant, recessive, duplicate dominant, or duplicate recessive)? 2) Assign the phenotypes to a modified 9:3:3:1 ratio. (Do not just calculate the actual ratio of the phenotypes.) Red : _____Orange : _____Green: _____

In a unique species of plants, flowers may be yellow, blue, red, or mauve. All colors may be true breeding. If plants with blue flowers are crossed to red-flowered plants, all F1 plants have yellow flowers. When these produced an F2 generation, the following ratio was observed: 9/16 yellow: 3/16 blue: 3/16 red: 1/16 mauve In still another cross using true-breeding parents, yellow-flowered plants are crossed with mauve-flowered plants. Again, all F1 plants had yellow flowers and the F2 showed a 9:3:3:1 ratio, as just shown. (a) Describe the inheritance of flower color by defining gene symbols and designating which genotypes give rise to each of the four phenotypes. (b) Determine the F1 and F2 results of a cross between truebreeding red and true-breeding mauve-flowered plants.

Two genes of a flower, one controlling blue (B) versus white(b) petals and the other controlling round (R) versus oval (r)stamens, are linked and are 10 map units apart. You cross ahomozygous blue oval plant with a homozygous white round plant. The resulting F1 progeny are crossed with homozygouswhite oval plants, and 1,000 offspring plants are obtained.How many plants of each of the four phenotypes do youexpect?

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Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 13GP

Summary Introduction

To determine: The number of red axial flowers in F2 offspring among 100 outcomes.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous conditions.

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Answer 3

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Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 13GP

Summary Introduction

To determine: The number of red axial flowers in F2 offspring among 100 outcomes.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous conditions.

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Check out a sample textbook solution

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Answer 4

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Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 13GP

Summary Introduction