The linkage in the three loci and their map distances. . Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

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Answer 1

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Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The linkage in the three loci and their map distances. .

Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

b.

Summary Introduction

To determine: The allele arrangement on the chromosomes of the triple heterozygote used in the testcross.

Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.

c.

Summary Introduction

To determine: The value of interference.

Introduction: The law of independent assortment was given in a dihybrid cross which is the cross between the alleles of two pairs of contrasting characters. The alleles produced by each character are independent to combine with the alleles of the other character. This independent sorting of the alleles irrespective of the dominant or the recessive trait is defined as the law of independent assortment.

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Your goal is to produce black seeds resistant to mold. So you make the same cross again (between a homozygous black seeded, mold susceptible parent and a homozygous white seeded and mold resistant parent), and, again, advance progeny by SSD to create 100 F10 generation plants. Based on the information you obtained from your first crossing experiment (Question #4), how many F10 plants would you expect to have black seeds and be resistant to mold? Assume that a toxin produced by the mold fungus has been isolated. Only mold resistant seeds will germinate in the presence of the toxin. Could you use this toxin screening procedure to have segregation distortion work in your favor in the F2 generation? Explain your answer. Info from Question 4 a. P Locus (Seed Color): Hypothesis: The null hypothesis (H₀) is that seed color is controlled by alleles at a single locus. Observed Data: Total white seeds: 45 (resistant plants) + 6 (susceptible plants) = 51 Total black seeds: 7 (resistant…

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Using Punnett Squares Punnett squares are one good way to predict the outcome of genetic crosses. Punnett squares use mathematical probability to help predict the genotype and phenotype combinations in genetic crosses. The number of possible alleles from each parent determines the number of rows and columns in the Punnett square. Independent Assortment KEY QUESTION How do alleles segregate when more than one gene is involved? Mendel wondered if the segregation of one pair of alleles affects another pair. For example, does the gene that determines the shape of a seed affect the gene for seed color? This type of experiment is known as a two-factor, or dihybrid, cross because it involves two different genes. Single-gene crosses are monohybrid crosses. Visual Reading Tool: Two-Factor Cross: F₂ The Punnett square shows the results of self-crossing the F, generation of a cross between round yellow peas and wrinkled green peas. 1. List the different genotypes in the F, generation. What is the…

Answer 2

Question

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The linkage in the three loci and their map distances. .

Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

b.

Summary Introduction

To determine: The allele arrangement on the chromosomes of the triple heterozygote used in the testcross.

Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.

c.

Summary Introduction

To determine: The value of interference.

Introduction: The law of independent assortment was given in a dihybrid cross which is the cross between the alleles of two pairs of contrasting characters. The alleles produced by each character are independent to combine with the alleles of the other character. This independent sorting of the alleles irrespective of the dominant or the recessive trait is defined as the law of independent assortment.

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Answer 3

Question

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The linkage in the three loci and their map distances. .

Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

b.

Summary Introduction

To determine: The allele arrangement on the chromosomes of the triple heterozygote used in the testcross.

Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.

c.

Summary Introduction

To determine: The value of interference.

Introduction: The law of independent assortment was given in a dihybrid cross which is the cross between the alleles of two pairs of contrasting characters. The alleles produced by each character are independent to combine with the alleles of the other character. This independent sorting of the alleles irrespective of the dominant or the recessive trait is defined as the law of independent assortment.

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Answer 4

Question

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The linkage in the three loci and their map distances. .

Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

b.

Summary Introduction

To determine: The allele arrangement on the chromosomes of the triple heterozygote used in the testcross.

Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.

c.

Summary Introduction

To determine: The value of interference.

Introduction: The law of independent assortment was given in a dihybrid cross which is the cross between the alleles of two pairs of contrasting characters. The alleles produced by each character are independent to combine with the alleles of the other character. This independent sorting of the alleles irrespective of the dominant or the recessive trait is defined as the law of independent assortment.

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Answer 5

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The linkage in the three loci and their map distances. .

Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

b.

Summary Introduction

To determine: The allele arrangement on the chromosomes of the triple heterozygote used in the testcross.

Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.

c.

Summary Introduction

To determine: The value of interference.

Introduction: The law of independent assortment was given in a dihybrid cross which is the cross between the alleles of two pairs of contrasting characters. The alleles produced by each character are independent to combine with the alleles of the other character. This independent sorting of the alleles irrespective of the dominant or the recessive trait is defined as the law of independent assortment.

Answer 6

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The linkage in the three loci and their map distances. .

Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

Answer 7

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The linkage in the three loci and their map distances. .

Introduction. Linkage is the phenomenon in which two or more genes are linked to each other being present very close to each other on the chromosome. This causes the genes to prevent crossing over and pass on as wild state from parent to offspring.

Answer 8

b.

Summary Introduction

To determine: The allele arrangement on the chromosomes of the triple heterozygote used in the testcross.

Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.

Answer 9

b.

Summary Introduction

To determine: The allele arrangement on the chromosomes of the triple heterozygote used in the testcross.

Introduction. Recombination is the process that is exclusive to the meiotic division as it allows the exchange of genetic material between the non-homologous chromosomes. The recombination process is responsible for the shuffling of the characters and producing a zygote that is different from both the parents but have the chromosomes from both the parents.

Answer 10

c.

Summary Introduction

To determine: The value of interference.

Introduction: The law of independent assortment was given in a dihybrid cross which is the cross between the alleles of two pairs of contrasting characters. The alleles produced by each character are independent to combine with the alleles of the other character. This independent sorting of the alleles irrespective of the dominant or the recessive trait is defined as the law of independent assortment.

Answer 11

c.

Summary Introduction

To determine: The value of interference.

Introduction: The law of independent assortment was given in a dihybrid cross which is the cross between the alleles of two pairs of contrasting characters. The alleles produced by each character are independent to combine with the alleles of the other character. This independent sorting of the alleles irrespective of the dominant or the recessive trait is defined as the law of independent assortment.

Answer 12

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Answer 15

Ch. 4 - Prob. 1P Ch. 4 - Prob. 2P Ch. 4 - Prob. 3P Ch. 4 - Prob. 4P Ch. 4 - Prob. 5P Ch. 4 - Prob. 6P Ch. 4 - Prob. 7P Ch. 4 - Prob. 8P Ch. 4 - Prob. 9P Ch. 4 - Prob. 10P

Solution Summary: The author explains the law of independent assortment in a dihybrid cross, which is the cross between the alleles of two pairs of contrasting characters.

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