The frequency of recombinants (RF). Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

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Answer 1

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Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

b.

Summary Introduction

To determine: The uncorrected map distance, based on RF.

Introduction: A linkage map is a table for a species or investigational population that displays the position of its known genes or genetic markers comparative to each other in terms of recombination frequency, rather than a particular physical distance along each chromosome.

c.

Summary Introduction

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

d.

Summary Introduction

To determine: The corrected map distance, based on the mapping function

Introduction: Genetic maps are constructed by recombination frequencies since both odd and even numbers of crossovers can take place between any two gene loci, as the physical distance between two loci rises, the maximum recombination frequency levels off at 50%.

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Consider the first category of test-cross offspring shown in figure 8.2 (+b, LS). Consider also that the parents of the heterozygous female flies in the test cross had the following genotypes: bb, SS, and +, LL. A. What would be the physical phenotype of these flies? B. If PC was conducted with the DNA of one of these flies using the primers for the molecular marker, what would be the appearance of the bands on an electrophoresis gel with the PC products? C. If the gene for black body and the locus for the molecular marker (L long or S short) were unlinked, what proportion of the test-cross progeny would be black flies that are heterozygous for the molecular marker? What proportion would be flies with normal body color, which are homozygous for one form of the molecular marker? D. If the gene for black body and the locus for the molecular marker were linked, how would the proportion of flies be different?

Consider two maize plants:a. Genotype C/c m ; Ac/Ac+, where cm is an unstable allele caused by a Ds insertionb. Genotype C/c m, where cm is an unstable allele caused by Ac insertionWhat phenotypes would be produced and in what proportions when (1) each plant is crossed with a basepair-substitution mutant c/c and (2) the plant in part a is crossed with the plant in part b? Assume that Ac and c are unlinked, that the chromosome-breakage frequency is negligible, and that mutant c /C is Ac+.

Please label the tetrad type in the table as PD (parental ditype), NPD (non parental ditype) or T (tetratype) and answer the following questions a) Are the genes linked? Please explain SPECIFICALLY how you can distinguish between linked and unlinked genes in this instance. b) If the two genes are linked, calculate the % recombination between ser and thr. Show the formula used, as well as all of your calculations. c) Draw a single map illustrating the arrangement of the two genes on the chromosome with respect to each other and to the centromere of the chromosome. Make sure to map ALL three distances

Answer 2

Question

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

b.

Summary Introduction

To determine: The uncorrected map distance, based on RF.

Introduction: A linkage map is a table for a species or investigational population that displays the position of its known genes or genetic markers comparative to each other in terms of recombination frequency, rather than a particular physical distance along each chromosome.

c.

Summary Introduction

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

d.

Summary Introduction

To determine: The corrected map distance, based on the mapping function

Introduction: Genetic maps are constructed by recombination frequencies since both odd and even numbers of crossovers can take place between any two gene loci, as the physical distance between two loci rises, the maximum recombination frequency levels off at 50%.

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Answer 3

Question

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

b.

Summary Introduction

To determine: The uncorrected map distance, based on RF.

Introduction: A linkage map is a table for a species or investigational population that displays the position of its known genes or genetic markers comparative to each other in terms of recombination frequency, rather than a particular physical distance along each chromosome.

c.

Summary Introduction

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

d.

Summary Introduction

To determine: The corrected map distance, based on the mapping function

Introduction: Genetic maps are constructed by recombination frequencies since both odd and even numbers of crossovers can take place between any two gene loci, as the physical distance between two loci rises, the maximum recombination frequency levels off at 50%.

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Answer 4

Question

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

b.

Summary Introduction

To determine: The uncorrected map distance, based on RF.

Introduction: A linkage map is a table for a species or investigational population that displays the position of its known genes or genetic markers comparative to each other in terms of recombination frequency, rather than a particular physical distance along each chromosome.

c.

Summary Introduction

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

d.

Summary Introduction

To determine: The corrected map distance, based on the mapping function

Introduction: Genetic maps are constructed by recombination frequencies since both odd and even numbers of crossovers can take place between any two gene loci, as the physical distance between two loci rises, the maximum recombination frequency levels off at 50%.

Expert Solution & Answer

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Answer 5

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

b.

Summary Introduction

To determine: The uncorrected map distance, based on RF.

Introduction: A linkage map is a table for a species or investigational population that displays the position of its known genes or genetic markers comparative to each other in terms of recombination frequency, rather than a particular physical distance along each chromosome.

c.

Summary Introduction

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

d.

Summary Introduction

To determine: The corrected map distance, based on the mapping function

Introduction: Genetic maps are constructed by recombination frequencies since both odd and even numbers of crossovers can take place between any two gene loci, as the physical distance between two loci rises, the maximum recombination frequency levels off at 50%.

Answer 6

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

Answer 7

Chapter 4, Problem 40P

a.

Summary Introduction

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

Answer 8

b.

Summary Introduction

To determine: The uncorrected map distance, based on RF.

Introduction: A linkage map is a table for a species or investigational population that displays the position of its known genes or genetic markers comparative to each other in terms of recombination frequency, rather than a particular physical distance along each chromosome.

Answer 9

b.

Summary Introduction

To determine: The uncorrected map distance, based on RF.

Introduction: A linkage map is a table for a species or investigational population that displays the position of its known genes or genetic markers comparative to each other in terms of recombination frequency, rather than a particular physical distance along each chromosome.

Answer 10

c.

Summary Introduction

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

Answer 11

c.

Summary Introduction

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

Answer 12

d.

Summary Introduction

To determine: The corrected map distance, based on the mapping function

Introduction: Genetic maps are constructed by recombination frequencies since both odd and even numbers of crossovers can take place between any two gene loci, as the physical distance between two loci rises, the maximum recombination frequency levels off at 50%.

Answer 13

d.

Summary Introduction

To determine: The corrected map distance, based on the mapping function

Introduction: Genetic maps are constructed by recombination frequencies since both odd and even numbers of crossovers can take place between any two gene loci, as the physical distance between two loci rises, the maximum recombination frequency levels off at 50%.

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 4 - Prob. 1P Ch. 4 - Prob. 5P Ch. 4 - Prob. 12P Ch. 4 - Prob. 13P Ch. 4 - Prob. 14P Ch. 4 - Prob. 15P Ch. 4 - Prob. 16P Ch. 4 - Prob. 17P Ch. 4 - Prob. 18P Ch. 4 - Prob. 19P

The frequency of recombinants (RF). Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

Solution Summary: The author explains the frequency of recombinants in a heterozygous trait. The uncorrected map distance depends on the Perkins formula.

Concept explainers

Videos

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

Want to see the full answer?

Chapter 4 Solutions

The frequency of recombinants (RF). Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

Solution Summary: The author explains the frequency of recombinants in a heterozygous trait. The uncorrected map distance depends on the Perkins formula.

Concept explainers

Videos

To determine: The frequency of recombinants (RF). Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

To determine: The corrected map distance, based on tetrad frequencies. Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.

Want to see the full answer?

Chapter 4 Solutions

To determine: The frequency of recombinants (RF).

Introduction: A heterozygous is a trait when dissimilar kinds of two alleles combine to form a feature. In this type, dominant and recessive alleles are present in the pair, and the dominant will signify the type of trait the offspring will show.

To determine: The corrected map distance, based on tetrad frequencies.

Introduction: Genetic distance is a extent of the genetic deviation between species or between populations within a species, whether the length measures the time from a common ancestor or degree of variation.