While Drosophila Have the Simplest Single Set of Hox Genes

question 7

Multiple Choice

While Drosophila have the simplest single set of Hox genes on a single chromosome, higher vertebrates typically have four sets across four different chromosomes. How many wholesale duplications of the Hox complex must have occurred during vertebrate evolution?

• A) 2
• B) 1
• C) 3
• D) 4

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Definitions:

Net Income

The net income of a company, which is calculated by deducting all costs and taxes from its total earnings.

Break-Even Point

The production level or sales volume at which total revenues equal total expenses, resulting in no net loss or gain.

Contribution Margin Ratio

A financial metric that represents the percentage of sale price that remains after variable costs are subtracted.

Sales Dollars

The total amount of money generated from the sale of goods or services before any expenses are subtracted.