Genetic Analysis: An Integrated Approach (3rd Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
3rd Edition
ISBN: 9780134605173
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 5, Problem 26P
Summary Introduction

To analyze:

Considering cross between a trihybrid wild type plant to a plant with the recessive phenotypes answer the following using data in the given table.

Phenotype Number
Compound leaves 324
Compound leaves, intercalary leaflets 32
Compound leaves, green fruits 5
Compound leaves, intercalary leaflets, green fruits 51
Intercalary leaflets 3
Intercalary leaflets, green fruits 309
Green fruits 42
Wild type 49
815
  1. The order of genes on the chromosome, alleles that are present on each of the homologous chromosomes.

  2. The recombination frequencies between each of the adjacent pairs of genes.

  3. The interference value for the given cross.

Introduction:

To determine the order of genes on the chromosome and alleles present on each of the homologous chromosomes, phenotype information about pure-breeding parental plants is used. According to the given information, the parent plants are pure-breeding dominant and pure-breeding recessive. Recombination frequency for a pair of linked genes is calculated by counting the total number of crossovers occurring between them. Interference is used to identify the proportion of double recombinants that are expected but are not produced in the experiment.

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Genetic Analysis: An Integrated Approach (3rd Edition)

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