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Gene Linkage

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Questions and Answers

Which of the following is true about crossing over?

It occurs between sister chromatids
It results in recombination (correct)
It only produces parental gametes
It is not related to gene mapping

What does complete linkage between two genes mean?

The genes are located on different chromosomes
The genes are located far apart on the same chromosome
The genes are located close together on the same chromosome
There is no crossing over between the genes (correct)

What does a chromosome map indicate?

The order of genes on a chromosome (correct)
The type of genes on a chromosome
The number of genes on a chromosome
The location of genes on different chromosomes

What is a linkage group?

<p>Genes located close together on the same chromosome (D)</p> Signup and view all the answers

What is the relationship between the frequency of crossing over and the distance between genes on a chromosome?

<p>The frequency of crossing over decreases with increasing distance (D)</p> Signup and view all the answers

Study Notes

Crossing Over and Linkage

Crossing over is the exchange of genetic material between homologous chromosomes during meiosis, resulting in genetic recombination.
Complete linkage between two genes means that they are always inherited together due to their close proximity on the same chromosome.
A chromosome map indicates the relative positions of genes along a chromosome, showing the distance between genes in terms of the frequency of crossing over.
A linkage group is a set of genes that tend to be inherited together because they are located close to each other on the same chromosome.
The frequency of crossing over is directly related to the distance between genes on a chromosome: the closer the genes are, the lower the frequency of crossing over, and vice versa.

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Description

Test your knowledge on linkage, crossing over, and mapping of genes with this quiz. Explore concepts such as independent assortment, the frequency of crossing over, and the resulting recombination. Learn about chromosome maps and how they indicate the relative location of genes on a chromosome. Copyright © 2019 Pearson Education, Inc. All Rights Reserved.