a. To explain: The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors. Introduction: Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

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Answer 1

Question

Chapter 2, Problem 32P

Summary Introduction

a.

To explain:

The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors.

Introduction:

Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

Summary Introduction

b.

To determine:

Whether some different gene would have been the one that governs Mendel’s flower colors or not based on the given biochemical pathway

Introduction:

Phenotypic expression of a gene is dependent on the types of alleles present in that gene. The homozygous and heterozygous condition causes expression of the dominant allele only, except in the case of co-dominance. Recessive alleles are expressed in homozygous (recessive) conditions only.

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The following genotypes of two independently assorting autosomal genes determine coat color in rats:A-B- (gray); A-bb (yellow); aaB-(black); aabb (cream)A third gene pair on a separate autosome determines whetherany color will be produced. The CC and Cc genotypes allow coloraccording to the expression of the A and B alleles. However,the cc genotype results in albino rats regardless of the A and Balleles present. Determine the F1 phenotypic ratio of the followingcrosses: (a)AAbbCC * aaBBcc; (b) AaBBcc * AABbcc;(c) AaBbCc * AaBbcc.

a. What is the Raly gene? What does it encode? How does it relate to the lethality of Ay? b. A heterozygous mouse AAy does not produce enough pigment and it is yellow. Homozygous individuals die during development, but AAy heterozygous do not. Why? You may use any graphic aid to explain this, if necessary. This means that you may use a Punnett square or a forking segregation diagram, or computations with fractions. c. Explain why there is a non-Mendelian 2:1 yellow/agouti phenotypic ratio in this cross.

In wheat, aleurone cells form a thin layer of the seed coat that is critical to early gene expression in plant development. The color of this layer of cells is controlled by two alleles of a gene [colored aleurone (R) is dominant to colorless (r)]. A second gene is known to control the color of leaf tips [green leaf tip (G) is dominant to yellow (g)]. Two plants, each heterozygous for both characteristics, are test crossed to homozygous recessives, and their progeny are combined to produce the following totals: colored green 102 colored yellow 98 colorless green 103 colorless yellow 97 a) Use chi-square analysis to test these data for an independent assortment of the two characteristics (table provided). Please show work, how your expected values are calculated, and explain what your results indicate about the data. b) You decide to be cautious in your analysis, and decide to analyze the progeny from each of the crosses individually (instead of adding them together as shown above).…

Answer 2

Question

Chapter 2, Problem 32P

Summary Introduction

a.

To explain:

The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors.

Introduction:

Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

Summary Introduction

b.

To determine:

Whether some different gene would have been the one that governs Mendel’s flower colors or not based on the given biochemical pathway

Introduction:

Phenotypic expression of a gene is dependent on the types of alleles present in that gene. The homozygous and heterozygous condition causes expression of the dominant allele only, except in the case of co-dominance. Recessive alleles are expressed in homozygous (recessive) conditions only.

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Answer 3

Question

Chapter 2, Problem 32P

Summary Introduction

a.

To explain:

The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors.

Introduction:

Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

Summary Introduction

b.

To determine:

Whether some different gene would have been the one that governs Mendel’s flower colors or not based on the given biochemical pathway

Introduction:

Phenotypic expression of a gene is dependent on the types of alleles present in that gene. The homozygous and heterozygous condition causes expression of the dominant allele only, except in the case of co-dominance. Recessive alleles are expressed in homozygous (recessive) conditions only.

Expert Solution & Answer

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Answer 4

Question

Chapter 2, Problem 32P

Summary Introduction

a.

To explain:

The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors.

Introduction:

Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

Summary Introduction

b.

To determine:

Whether some different gene would have been the one that governs Mendel’s flower colors or not based on the given biochemical pathway

Introduction:

Phenotypic expression of a gene is dependent on the types of alleles present in that gene. The homozygous and heterozygous condition causes expression of the dominant allele only, except in the case of co-dominance. Recessive alleles are expressed in homozygous (recessive) conditions only.

Expert Solution & Answer

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Answer 5

Chapter 2, Problem 32P

Summary Introduction

a.

To explain:

The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors.

Introduction:

Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

Summary Introduction

b.

To determine:

Whether some different gene would have been the one that governs Mendel’s flower colors or not based on the given biochemical pathway

Introduction:

Phenotypic expression of a gene is dependent on the types of alleles present in that gene. The homozygous and heterozygous condition causes expression of the dominant allele only, except in the case of co-dominance. Recessive alleles are expressed in homozygous (recessive) conditions only.

Answer 6

Chapter 2, Problem 32P

Summary Introduction

a.

To explain:

The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors.

Introduction:

Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

Answer 7

Chapter 2, Problem 32P

Summary Introduction

a.

To explain:

The differences between the dominant allele P and the recessive allele p of the gene that is responsible for the flower colors.

Introduction:

Different varieties of the same trait are coded by different alleles of the same gene. Alleles can be present in homozygous (both are same) or in heterozygous (different alleles) condition in a gene.

Answer 8

Summary Introduction

b.

To determine:

Whether some different gene would have been the one that governs Mendel’s flower colors or not based on the given biochemical pathway

Introduction:

Phenotypic expression of a gene is dependent on the types of alleles present in that gene. The homozygous and heterozygous condition causes expression of the dominant allele only, except in the case of co-dominance. Recessive alleles are expressed in homozygous (recessive) conditions only.

Answer 9

Summary Introduction

b.

To determine:

Whether some different gene would have been the one that governs Mendel’s flower colors or not based on the given biochemical pathway

Introduction:

Phenotypic expression of a gene is dependent on the types of alleles present in that gene. The homozygous and heterozygous condition causes expression of the dominant allele only, except in the case of co-dominance. Recessive alleles are expressed in homozygous (recessive) conditions only.

Answer 10

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Answer 11

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Answer 12

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Answer 13

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Solution Summary: The author explains the differences between the dominant and the recessive alleles of the gene that is responsible for the flower colors.

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