Loading biol110..

Introduction

Previously we examined the relationship between gene segregation and meiosis. As you should now know, Mendel was able to infer independent assortment between different genes because they were located on different chromosomes (each of which assorts randomly during meiosis). We also mentioned that genes located on the same chromosome may segregate together because they are linked. Next, you will learn why they may, or may not, segregate together. Moreover, you will learn how the frequency at which they become unlinked can be used to construct a genetic map of each chromosome.

The Learning Objectives for this tutorial are that by the end of this tutorial you should be able to:

Explain the events in meiosis that result in the independent assortment of genes, and the phenomenon of crossing over
Describe the relationship of the distance between genes on the same chromosome and the frequency of crossing over between the genes
Calculate the recombination frequency between linked genes based upon the frequency of offspring phenotypes
Use the recombination frequency between genes to map genes to a chromosome
Explain how the position of genes on a chromosome can affect the recombination frequency
Discuss how some genes may be completely linked and not assort independently

Please use a modern browser to view our website correctly. Update my browser now