Imagine You Are Studying an Expanded Gene Family in a Group

question 22

Essay

Imagine you are studying an expanded gene family in a group of closely related species,and you would like to know whether the gene family expanded long ago in the common ancestor of all the species,or whether the gene family has expanded independently,and more recently,within some or all of the species.How would you use DNA sequences from the gene family in each species to test this? (Hint: Evolutionary trees are required.)

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Definitions:

Input

Resources used in the process of production, including raw materials, labor, and overhead costs.

Materials Quantity Variance

The difference between the actual quantity of materials used in production and the standard quantity allowed for the actual output, multiplied by the standard price per unit of materials.

Actual Quantity

The real amount or number of units of materials, labor, or overhead used in the production process.

Standard Quantity

The predetermined amount of materials or resources expected to be used in the production of a product.