Studies of Single Gene Disorders Have Sought to Draw Correlations

question 20

Essay

Studies of single gene disorders have sought to draw correlations between the genotypes at a disease locus and the phenotype of the single gene but the genotype-phenotype correlations are often poor. Even within families there may be significant variability in the phenotype of affected members (who are expected or known to have the same genotypes at the disease locus). List three factors that can explain why that should be so.

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Definitions:

Preformatted Text Box

A user interface element that displays text in a specific format that is not subject to the usual processing applied to text (like automatic line breaks).

SmartArt

A graphic diagram tool included in office applications that allows users to visually communicate information through a variety of charts, cycles, hierarchies, and relationships.

Mail Merge Wizard

A tool within word processing software that assists users in creating documents that combine a standard template with personalized information for multiple recipients.

Text Wrapping

The process of adjusting the flow of text around a graphic or other object within a document.