The number of pair genes that regulate the length of the tail. 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 expresses itself by masking the expression of a recessive allele.

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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 9GP

a.

Summary Introduction

To determine: The number of pair genes that regulate the length of the tail.

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 expresses itself by masking the expression of a recessive allele.

Summary Introduction

To determine: The phenotype of the offspring when a pig with 15cm tail is crossed with a pig having 30 cm tail.

Introduction: If the genes are said to be homozygous, they have identical alleles that are either dominant or recessive. If the genes are said to be heterozygotes, they have non-identical alleles—one being dominant and other being recessive allele.

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In c. elegans, genetics model organism, movement problems (unc) and small body size (sma) are encoded by two mutant alleles that are recessive to those that produce wild-type traits (unc+ and sma+). A worm homozygous for movement problems and small body is crossed with a worm homozygous for the wild-type traits. The F1 have normal movement and normal body size. The F1 are then crossed with worms that have movement problems and small body size in a testcross. The progeny of this testcross is: Normal movement, normal body size 210 Movement problems, normal body size 9 Normal movement, small body size 11 Movement problems, small body size 193 a)From the test cross results, can you tell if the two genes are on the same chromosome or not? Explain your reasoning. b)What phenotypic proportions would be expected if the genes for round eyes and white body were located on different chromosomes? (please explain hot to get to these conclusions)

In Drosophila, the sepia mutation (se, chromosome 3, position 26) results in dark brown eyes, while cinnabar (cn, chromosome 2, position 57.5) results in bright orange-red eyes. True breeding, wild type females are mated with true breeding males homozygous recessive for both traits. Using Drosophila notation, diagram the P1 and F1 crosses. P1 F1 Fill in the chart with phenotypic ratios that would be expected in the F2 generation. Use the space provided to show your work. Phenotype Females Males Overall (♀and ♂) =1 =1

Wing shape (A/a) and body color (B/b) in Drosophila are controlled by two independently assorting gene pairs. Flies with curved wings and gray body were crossed with each other and produced the following offspring: 36 curved wings, gray body 12 curved wings, black body 18 straight wings, gray body 6 straight wings, black body Questions: 1. Describe the interactions that will explain the observed phenotypic ratio. Indicate the phenotype specified by each allele, and the interaction(s) between the alleles.

Answer 2

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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 9GP

a.

Summary Introduction

To determine: The number of pair genes that regulate the length of the tail.

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 expresses itself by masking the expression of a recessive allele.

Summary Introduction

To determine: The phenotype of the offspring when a pig with 15cm tail is crossed with a pig having 30 cm tail.

Introduction: If the genes are said to be homozygous, they have identical alleles that are either dominant or recessive. If the genes are said to be heterozygotes, they have non-identical alleles—one being dominant and other being recessive allele.

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Answer 3

Question

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 9GP

a.

Summary Introduction

To determine: The number of pair genes that regulate the length of the tail.

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 expresses itself by masking the expression of a recessive allele.

Summary Introduction

To determine: The phenotype of the offspring when a pig with 15cm tail is crossed with a pig having 30 cm tail.

Introduction: If the genes are said to be homozygous, they have identical alleles that are either dominant or recessive. If the genes are said to be heterozygotes, they have non-identical alleles—one being dominant and other being recessive allele.

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Answer 4

Question

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 9GP

a.

Summary Introduction

To determine: The number of pair genes that regulate the length of the tail.

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 expresses itself by masking the expression of a recessive allele.

Summary Introduction

To determine: The phenotype of the offspring when a pig with 15cm tail is crossed with a pig having 30 cm tail.

Introduction: If the genes are said to be homozygous, they have identical alleles that are either dominant or recessive. If the genes are said to be heterozygotes, they have non-identical alleles—one being dominant and other being recessive allele.

Expert Solution & Answer

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Answer 5

Chapter 14, Problem 9GP

a.

Summary Introduction

To determine: The number of pair genes that regulate the length of the tail.

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 expresses itself by masking the expression of a recessive allele.

Summary Introduction

To determine: The phenotype of the offspring when a pig with 15cm tail is crossed with a pig having 30 cm tail.

Introduction: If the genes are said to be homozygous, they have identical alleles that are either dominant or recessive. If the genes are said to be heterozygotes, they have non-identical alleles—one being dominant and other being recessive allele.

Answer 6

Chapter 14, Problem 9GP

a.

Summary Introduction

To determine: The number of pair genes that regulate the length of the tail.

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 expresses itself by masking the expression of a recessive allele.

Answer 7

Chapter 14, Problem 9GP

a.

Summary Introduction

To determine: The number of pair genes that regulate the length of the tail.

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 expresses itself by masking the expression of a recessive allele.

Answer 8

Summary Introduction

To determine: The phenotype of the offspring when a pig with 15cm tail is crossed with a pig having 30 cm tail.

Introduction: If the genes are said to be homozygous, they have identical alleles that are either dominant or recessive. If the genes are said to be heterozygotes, they have non-identical alleles—one being dominant and other being recessive allele.

Answer 9

Summary Introduction

To determine: The phenotype of the offspring when a pig with 15cm tail is crossed with a pig having 30 cm tail.

Introduction: If the genes are said to be homozygous, they have identical alleles that are either dominant or recessive. If the genes are said to be heterozygotes, they have non-identical alleles—one being dominant and other being recessive allele.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 14 - Fill in the following diagram of a cross of...Ch. 14 - A tall pea plant is crossed with a recessive dwarf...Ch. 14 - A true-breeding tall, purple-flowered pea plant...Ch. 14 - a. In the following cross, what is the probability...Ch. 14 - Prob. 5IQ Ch. 14 - Consider an example in which the M/m gene (for...Ch. 14 - The height of spike weed is a result of polygenic...Ch. 14 - Consider the following pedigree for the trait...Ch. 14 - a. What is the probability that a mating between...Ch. 14 - If two prospective parents both have siblings who...

Solution Summary: The author explains that a single character is controlled by one or more pairs of alleles, which can be either dominant or recessive.

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